Need help with spider den

Hey guys I’m a fairly new player have purchased some packs etc that I’ve found to be beneficial but I’m mostly f2p. I’m grinding the Spiders Den for the Tournament right now as I’ve been able to win both of the last tourneys and I figured it helps me with the dungeon divers event to do killing two birds with one stone. I am stuck on stage 7 and cannot get passed. Was hoping to grind to 10 and then just grind stage 10 all day. My questions is which of my champs would you be using for this, and what gear would you put on them? For the record Kael is the only one with full mastery or any mastery for that matter. I’ve been using:

Kael in new player life steal armor all 6 pieces level 16

Snorting Thug in destroy and divine life artifacts all leveled to 12

Torturehelm in all leve 12 epic life gear so 3 %45 HP boost if I’m understanding the stats correct

Harvest Jack in 4 pieces of fury and 2 pieces of life gear. For both bonus’ gauntlets and weapon are level 16 the rest is 13

Lamibur in stalwart and life gear all level 13.

Any advice helps thanks a lot guys and I can’t lie super stoked to have found this game it’s super fun