How viable is this?

Assuming a 30 VIT Warrior, with full i90 DPS accessories, except for an i100 Ribbon of Slaying. Also, what is the recommended food for the above setup - HQ Buttons in a Blanket vs. HQ Black Truffle Risotto?

I know people run 5 DPS to push the second Phase so we don't get Ballistic Missiles + Dreadnought/Landmines at the same time. Just wondering if a Warrior with DPS gear and specs will be able to push enough DPS to achieve the same result.