What is the utility of Onslaught and Upheaval?

[Nyoraii]

I don't think you normally want to start with a gap closer unless you want the dps to be behind a gcd or more for the fight.

But what of questing or just having fun? You can't use Onslaught unless you always remind yourself not to use the full bar, which also sucks because then you're slowing down your FCs and ICs.

Can't tell if you're trolling about upheaval or not. Fell Cleave is 590 potency for a cost of 50 gauge, which is 11.8 potency per gauge point (590/50). Upheaval is 450 potency for a cost of 20 gauge, which is 22.5 potency per gauge point (450/20). In other words, upheaval gives you more damage per gauge.

Use upheaval on cooldown. Onslaught is situational. I recommend https://thebalanceffxiv.com/ and it's associated discord for any further questions.

Didn't think it was that easy to calculate, I mean, you didn't account for the cd reduction of Infuriate from FC.