Broken?

[Dffleg]

Krak Gun cant proc while Aqua is active. We have been trying to tell you that.

Landing a charged attack from Krak Gun while Aqua is active also doesn't stop Aqua proc, aqua proc proceeds as usual.

Krak Gun never goes into cooldown because it never actually procced

Yes, you can't proc another weapon untill the cooldown timer has gone away.

Try arcane gun level 76 and kraken staff. Both of them proc on boss in same time. But their damage don t stack as scratch gun and staff did before level 81 expansion.