Thread: [Event 18] Advent Battle vs Vritra

Hi all, I have a little dilemma.
My main team is wind, so I've been working on water to combat wind's weakness.

So I was fortunate enough to get the Vitrua hammer as rainbow drop and I got 3 more copies of it and also MLB the eidolon. I have Aphrodite and Blephegor so my water squad is looking pretty decent.

I'm caught between the SSR weapon or the other Atk + weapon. Stats wise the SSR is +425 attack more and triple attack chance but it's an Hp++.
Which do I get ?
Also how much material do i need for all 4 copies of the SSR? Thanks

~Fury~