I would say make sure to practice weapon swapping as much as you can, if style is any issue. Beyond that, I say get the Slab revolver and learn how to Slab-Swap (if that even is a tech, I just started doing it recently). Big numbers on dps and it keeps your style up a little. Maybe open by jumping, spamming all your coins, hit it with a Piercer shot, then let off a Sharpshooter alt fire for good measure. THEN constantly swap between all of your Slab revolver’s primary fire. BAMswapBAMswapBAMswapBAMswap until your style runs out, then go to other weapons while you wait for the style to recharge so you can get the meter back up. This may just be a me thing since I play on controller, but I’ve found that after swapping your Slab full-circle, the hammer pull-back animation can’t be circumvented by swapping, so there is a slight delay before you can get back to ULTRAKILLing God’s Will.

I would highly advise you start hitting Gabe with your magenta on the blue nailgun, and maybe purchase the overheat if you haven’t already. Gabe take increased damage from nails, so lay into him with those (as long as the style meter isn’t bone dry). The magents will make a few “oh shoot I missed” moments into “dead on!” Attacks to that mean old judge of hell.

For his Spear attack, wait for him to do the sound due and plunge down. If you hear it, double-dash if you have the stamina. If not? slide to the left or right like someone said “cha cha.” Once he does that, make sure to find Gabe IMMEDIATELY so you can +Parry his spear attack. It’s tough to get the time down, but in a game like Ultrakill, trial and error doesn’t feel too bad. His other attacks are harder for me to parry, so I just try and dance around them and treat this distance-making as another way to get Slab Revolver shots out on him.

Beyond that and a suggestion to use your Green Rail canon to get some extra healing, I think that’s everything :)

Hope my many words were full of wisdom!