I missed Tagoar. I don't think the 7 turns matters much. Most arena teams don't go much beyond the 3rd or 4th rounds and with his roster you would want to take out the other team right after the revive. The big thing is that he will nead stoneskin gear which I doubt he has. 

His go 2nd team should be able to take out a silver level team pretty quick once he has the stoneskin gear. 

I made it to G5 in Classic arena without any stoneskin gear.  I have a go 2nd team.  I choose my fights carefully.  It takes a while but it is an effective strategy.  The only reason I still fight in Classic is to finish my Great Hall bonuses.  I have never built a champ just for either arena.  All the champs I use are from other battle types.  

With you champs is would suggest suggest sun wukong, kael, apoth, warmaiden.

Apoth for speed but he has to be the fastest champ on your team, warmaiden going second doing damage and dropping enemy team defense, then sun wukong going third to steal enemy buffs and doing damage and then kael to clean up the rest of the champs left alive

I made it up out of the basement, from bronze to Gold 5 and sometimes Platinum temporarily. It is not so hard but requires lots of patience and persistence (say time).

In a nutshell, you do not need to knock over much higher powered teams. Most of my opponents were cheapie champs up to 100k power. All you have to do is make a team, of 100k or more,  and just hit all the LPTs (low power teams) you see.  On each refresh of 10 there is usually one or two targets you can beat.  Believe me I have been doing this a long time.  Not only do I win enough gold bars for the GH but also win the arena tournament from time to time.

You may go a frew frefreshes without finding a target but then it evens out where you get 3 or 4 in a refresh.  I guarantee you if you try this approach you will be out of the dumps in no time.

As others have said though, I would put your effort into other parts of the game. It will help you in the long run. One thing that players that have been around for a long time forget is how much effort and time it takes to get a full set of masteries on your first few champions. 

When i was in Silver and lower levels of Arena, I prioritised getting my turn order and speed on my lead as fast as possible, had speed substats on every piece of gear and Speed boots of course...things started to change once i got my Speed over 190+  i started going first and being able to take the initiative in fights.

my advise, make sure you can farm 20 Dragon, you levelled solid champs to 60.

I dont know what some of those champs you have do, 

But a solid starter team can be High Khatun, Sun Wukong, Uggo(his debuff ability is amamazing I was using Warmaiden before i got him) , then Kael last as  your nuker...

Ive seen builds with  an Apothecary second so the team doesnt get cut off, 

try to farm weaker teams and teams at your level or lower... check their player power and also their team power

when you spend more and more time in arena you will slowly start to see the match outcomes etc..

take some time to read your opponent's champs team abilities...it will help you locate the threat and understand how their team runs.

you can cheese your way to Gold by being very careful what teams you attack...it takes a while though...

dont be discouraged by losses 

try to avoid matchups you know you will loose...

slowly start to tweak gear here and there as you farm and progress in other parts of the game... I mainly use a ton of gear i can craft and get from Clan boss etc compared to farmable gear from dungeons etc since i can manipulate the pieces I want from the Forge. 

yeah, there is so much to do in the game that I get scattered. I do have some masteries on my top champs but nowhere near full sets. 

I made it up out of the basement, from bronze to Gold 5 and sometimes Platinum temporarily. It is not so hard but requires lots of patience and persistence (say time).

In a nutshell, you do not need to knock over much higher powered teams. Most of my opponents were cheapie champs up to 100k power. All you have to do is make a team, of 100k or more,  and just hit all the LPTs (low power teams) you see.  On each refresh of 10 there is usually one or two targets you can beat.  Believe me I have been doing this a long time.  Not only do I win enough gold bars for the GH but also win the arena tournament from time to time.

You may go a frew frefreshes without finding a target but then it evens out where you get 3 or 4 in a refresh.  I guarantee you if you try this approach you will be out of the dumps in no time.

It is helpful to get full masteries on your best champ, which will be your farmer.  Then you might get green masteries on your dragon champs.  I made the mistake of putting full masteries on every lego I got.  Save full masteries for champs you know you will use for a while.  

I never pay attention to the the team power. I mean if I see a team with a bunch of +3 champions on their team I will avoid them.  Team makeup is much more important and how my team matches up against them.  For instance, any team with Ma' Shallad I am probably going to defeat because I have Shamael. Any counter-attack team I am probably going to beat because I have WuKong. I tend to avoid teams with Sirris because she counters my go 2nd team. Same with WuKong teams. Although sometimes I can kill a go-frst team with her just by using Sniktraak, Kavalax, Drex, and UDK. The other team essentially kills themselves. 

 I regularly beat teams much higher power than my own. For one thing, resisitance for some odd reason is weighted very heavily when calculating a team's power. I don't worry too much about resistance given my team makeup. 

Eventually you can spot very quickly teams that can defeat you and teams that cannot. I also just avoid annoying teams. Even when I can cleanse, Mithrala just annoys me so I will avoid teams with her. My Fenax can defeat teams designed to survive through reserections but depending on the team it just isn't worth my time. If I ever fully develop Xena and Ugir that will change because I will then  be able to easily counter those teams. Once again, with those two champions the other team is essentially going to kill themselves. 

At this point in the game I can't really determine a lot besides champ level, rarity, team power and opponent power. There are certain champs at 60 I know I'll lose to such as Arbiter, Ronda, UDK, Artak (is that the right name?) and I never play against a mythical lol. 

I know I'll learn more as I go. Still early days.

He can't win against any of these teams, shibb. His account is still far too new for that.

When i was in Silver and lower levels of Arena, I prioritised getting my turn order and speed on my lead as fast as possible, had speed substats on every piece of gear and Speed boots of course...things started to change once i got my Speed over 190+  i started going first and being able to take the initiative in fights.

my advise, make sure you can farm 20 Dragon, you levelled solid champs to 60.

I dont know what some of those champs you have do, 

But a solid starter team can be High Khatun, Sun Wukong, Uggo(his debuff ability is amamazing I was using Warmaiden before i got him) , then Kael last as  your nuker...

Ive seen builds with  an Apothecary second so the team doesnt get cut off, 

try to farm weaker teams and teams at your level or lower... check their player power and also their team power

when you spend more and more time in arena you will slowly start to see the match outcomes etc..

take some time to read your opponent's champs team abilities...it will help you locate the threat and understand how their team runs.

you can cheese your way to Gold by being very careful what teams you attack...it takes a while though...

dont be discouraged by losses 

try to avoid matchups you know you will loose...

slowly start to tweak gear here and there as you farm and progress in other parts of the game... I mainly use a ton of gear i can craft and get from Clan boss etc compared to farmable gear from dungeons etc since i can manipulate the pieces I want from the Forge. 

Are you able to win against bomb teams? They are my nemesis as I don't have a great mass cleanser.  At some point I will build a team to go against bomb teams but right now it just isn't worth my effort. I am going to try making a Bommel team out of Buringiri with really high resistance, Blizzar, WuKong, and Rhazin. that team could be really really annoying for bomb teams that do not have a block revive. 

In live arena, when I feel masochistic and play live arena, I will sometimes use Skytouched Shaman against bomb teams but most of the time that just delays the innevitable. 

Most  mythicals are not all that great in arena to be honest or at least there are better non-mythical options. There are a couple for to watch out for though. 

He can't win against any of these teams, shibb. His account is still far too new for that.