Not too far, I had to wait until I had a Lv.60 and the other 4 at Lv.50 to make it to the first boss. First boss wasn't really a challenge. But the second boss had me change strategy entirely because of the sudden change in type. Again, hope your champs got all 4/5-Stars gear in the Epic/Leg range. Rare as bare minimum. And also ascended at least to the 3rd star. I would try going for the 5/6 Star for the extra gear spot. Technically speaking, if you play well, you can do it in a month or two of practicing. Also, do CBs a lot, and try out tourneys and Events. That goes above and beyond champs. Unless you got mostly crappy ones. But you shouldn't if you do your daily rewards and spam green shards. Also, try to unlock as much as you can the higher levels. Less time invested in training like that.
Doom Tower is END GAME .... You and I are still babies compared to the Guys who do Doom that have 30 lvl 60s all with 5 or 6 star +16 Gear , that si Fully GLYPH'D
and the heros all have Full Masteries ...
I can get to room 7 , But its the dang HP Burn that kills me , NO HEALERS
Just maybe once we both can get into Gold Arena and stay there , we can do THE DOOM TOWER
Until then , Silver and Gold Arena just keeps getting Futher away , because the Guiys that are Able to Climb DOOM are leaving us behind in the DUST because they are getting the Items from it for Better Armors and Bonuses , and Are Probably be getting the Clan Bonuses too
I can See Bronze Arena turning into a bigger Zoo then it is now as People Climb into Doom Tower
and the Clans Even out into NOOBS ,, Pros and WHALES the Separation between Tiers in Arena will just keep getting Bigger
So it is WORKING AS INTENDED ,
Except it is the beginning of the End ,
Seen it on So many games over the last 30 years ,
it is Starting to be repetively Hilarious
Pretty soon , all that will be here are the Whales and the ** Occasional Payers **
and the Noobs that get Frustrated and leave after a month or 3