yes, how to deal with such kind of bosses
I cannot tell exactly you how to do this.
I didnt say you are a low level player, but I'm really concerned in general for low level players (Lv ~200) with no powerful monster will beat the tower, the mirror, the voyage, who had these kind of bosses.
Like this for example, he beat 29th floor of new tower which is struggling even for veteran player, I've seen the discussions over twitter, 26th-30th of the new tower are the hardest game can give right now.
Look at this, Lv 226, his monsters not +7, two of them even doesnt have soul stone.
It will be dangerous for the dev to notice this. Low level beats the hardest game mode?? tf man.
He's greedy, didnt know his place. Be grateful that you can beat another game mode that doesnt make veteran players suspicious.
Man, the new tower even still here for 25 days, you dont have to rush, you can do it that last couple hour of this (that's my trick).