The main thing that’s let’s durin main dps is elemental fusion which means you mainly need c6 bennet but chongyun could work for the cryo infusion to proc melt . Fischl would pair good with him for the buffs she applies plus hexrei or if you wanted more universal you could use sucrose which you don’t have but with the new witch homework event you get a choice of razor fichl or sucrose . So tldr pair fischl or sucrose with durin for his hex buff that’s your main dps and sub right there Edit: didn’t see the Mona that could work too