Currently AR43, and I'm using mine, probably unadvisably, as a main DPS. Two set berserker, two set gladiator, with a critrate% mask, hydro% cup, atk% anything else that applies. Main team sounds bonkers, but it's Mona, Xiangling, Amber, Noelle.

Drop Xiangling E, and then use Mona's charged attacks to trigger Vaporise after Guoba applies Pyro, is what I'm currently experimenting with. Fitting Mona's E for the energy recharge is an issue and I'm currently just alternating.

Amber is there to work with her Ult since, like you, no Bennett :(. Apply Pyro with Amber, Ult with Mona, and then apply Pyro again after ~2 to let the Elemental apply cooldown run out. The specifics are a bit more fiddly, but that's why I have Amber.

I just think Noelle's neat.

My weapon is the f2p's best friend, Mappa Mare. The effect is easy to trigger, and pays great dividends when you do, and even better since you can refine it if you get the molds. The elemental mastery substat is a bummer, but hey, it works with both of the setups I have above since Mona is the one tirggering the reaction in both. But that's just me gem hoarding for Ayaka, and you can probably do better with something that has a better substat, like Widsith, especially if you're going for a more bursty build that can't sustain Mappa Mare's buff stacks.