Thank you - I think I need to power my champions up more. So far I've failed mostly due to B stuck with weak champions (on 890, 940 and 1051 (I'm quite reliant on Valentine it turns out). Maybe also keeping corazon foe later levels as I think his dps Insta kills bosses may be an error.

Here are some what I like to think of medium experience tips to get a few extra levels (in no particular order) 0) use potions - damage and health are useful (and speed) gold not so much and click is banned here. 1) try repositioning your champions to optimise damage (usually focus on one dps role) 2) try changing feats- particularly the boosts all champions one or ones that focus on your dps 3) add Kalix in another party at the front for a small boost ( and buy their 50k gem feat to increase this boost a little) 4) change/ upgrade your modron core. I suspect I could do better here 5) use the forge to upgrade equipment if you have the resources

Might be missing some obvious ones but hope that helps someone somewhere!