Start with Drexthar, Visix and Coldheart.  The AOE HP burn is vital.  Visix and Coldheart to control turn meter.  If necessary, disable Visix A2 and A3, but her A3 provoke could be useful if you have high HP on her.  I don't remember the affinity for Spider 19, but for Spirit and Magic, use Apoth for healing, Scyl for AOE stun and extra healing.  High HP, ACC and SPD for all.  Hopefully, your BEK is an abberation as your COMMON artifacts aren't going to cut it, you need better artifacts and much higher spd

Thank you, I will try with these. Spider 19 is Force affinity.

I don't use much the dungeons because the Bosses are so random equipment dropping and always try in the campaign for the ones needed. Is there any trick for obtaining the ones that I needed?

Thanks again. 

UDK will completely absorb all spiderling attacks, so he definitely should be on your team. No reason to need Visix provoke.

• Yakarl (AOE CC)
• Visix (A1 TM)
• CH (A3 TM + Nuke)
• Siphi (buffs + revive)
• UDK (tank spiderlings)

Go with Krama's suggestion, he's been playing longer and helped me.

Thanks, I will try them.

Any suggestions for equipment?

I will raise Yakarl and UDK because they're at 50 only.

UDK needs to be tanky. You want him to have 300 RES. Other than that, just make him as survivable as possible.

For this fight specifically, Visix, Siphi, and Yakarl literally only need SPD and ACC. Their only job is to keep getting turns so they can do their respective jobs.

CH wants 70% CR and as much CDMG as possible, and probably around 180+ SPD.

What's the best equipment to achieve 300 RES?

I want to go with RES artifacts, but I don't have more than common of them.

RES chest + RES banner should be more than enough. Also, remember, Siphi has an aura that gives 80 RES, so you only need 220 with her aura.

Here is a team with champs from your roster op. 

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I think the gear requirements to make a team like that work will be pretty high :)

It shouldn't be to gear intensive. Really just requires 200+ accuracy on everyone. That and I guess like 170+ speed should do it. I could be out of touch though, none of these champions i just used have very good gearing, other than the coldheart, but she is just there for tm control anywas.

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My Team

You really should use the dungeons. You get the gear you need by making lots of runs, then you sell what is not needed. Silver is always good to have.

From the equipment of your Bad-El I assume, you did a lot of campaign runs. Perhaps it would not be the worst idea to run dragon for some time to get some more rare or epic equipment...

At last!

Now road to Lvl 20!

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Basically the same team as OP:

• Lyssandra (TM)
• Visix (A1 TM)
• Tyrant (HP Burn)
• Sethallia (healing + TM)
• UDK (tank spiderlings) 

Thanks, i'll try this.

I should note - you definitely need all of them to be 60. UDK especially.