how to beat chapter 1 doombringer lvl 6 battlers lvl 6 base upgrades

[@Timothyplays9106]

MR DOOMBRINER: AM GONNA BAN YOU BATTLER: AM GONNA REPORT YOU MR DOOMBRINGER: NO PLS😢

[@End_Oe]

I forgot if I did this all lvl 6 or all lvl 7 in the vid