Originally Posted by
nonsensei
A solid thing to point out, but a few corrections/additions: Tsuku adds 5% def down only in case you use Herc, and it would be more precise to say that Herc adds 15% when she finally bursts, since SSArty+Tsuku does cover for 35%. I know it feels a bit nitpicking, but that's how it is.
You could consider using Tish instead of Tsuku, since she's more offense friendly with her buff.
Also, you might as well consider using Shingen(Sniper Shot) instead of Herc, in which case Tsuku's light resist down has more value.
As for Take, her burst echo dmg works a bit more complicated than that. It depends on her number of stacks: number of stacks x 250k, the max is 1.25m (since 5 stacks are the max).