C Duel Infantry

I haven't seen a post about it, but I just wanted to know is anyone planning to use it? I'm deciding whether I should put it on Maria or not since she's easy to +10 too.

As of Nilla's PSA for Tier 21 (which I keep revisiting xD), the total with Askr Trio can still score 742+, which is needed to have a chance on staying if the Trio scores perfect +12 every round.

Even just a cheap Pain+ SavageBlow6 with C Duel Infantry on a healer scores pretty high.