Welcome to the community, @erada. I made a thread to assist with Delve team strategies. Scattered amongst the rants and ramblings of an addled brain are some links to other threads. Click Here: Delve Faction Team Strategies
Want a link to @Elitemastereric’s thread? It’s in there.
Want a link to @timeknight’s spreadsheat breakdown for recommended Hoard levels, or his spreadsheet for optimal treasure utilization for raising hoard levels? It’s in there.
Want @Texudo’s compilation of Faction Team runs with post numbers and lots of other good info? You guessed it, it’s in there.
As are additional links to strategies proposed by @Xolid99, @Dust_Angel, @TheIdleOne, @Magnusimus, and many others. (Apologies if I miss any call-outs)