I’ve ben playing this game for about 3 weeks I think and wanted to share my one team that facerolls against everything in the game at highest levels including lvl 200 delves. Not fully traited nor any mystic level:
Class - Titan, maxed out (Impact, Counteratack, Stone Circle, Storm Aura, Rock Solid, Lightnign Strike, Fortitude)
Banner - Slayer Banner (Dhrak-Zum)
Pet - none that matters
Mountain Crusher - lvl 9
Keeper of Souls - lvl 19, 1 trait
The Maraji Queen (or Moira CraigHeart lvl 18) - lvl 19, 3 traits
Glaycion - lvl 19, 3 traits
The strategy vs high level content is to never get the opponent to one-shot your troops. With this set up (unless extremely unlucky with gems) you will have perma barrier on your tank and perma full mana on all troops as long as you make sure to match at least 4 gems on any gems conversion action.
Worst case, if no combinations are available, use Mountain Crusher until you can restart the loop.
My team is a bit above 8k strength and I normally demolish any pvp opponent unless perma entangled.
Let me know your thoughts.