YAY! *SO* glad you got a win out of UV! And a 100% win to boot! This is the mortem I've been waiting for over the last few weeks!
Interesting to hear that you ran out of cells - Most players (myself included) go the other way, and tend not to use our precious cells until it's too late!
Glad to hear rocket-entry to levels worked out for you! It's a pain having to z-switch at the stairs, but it's rare that it causes you any damage doing so, and it can completely save your life on some layouts!
Taking WK is a tricky one - if you're not doing many special levels (especially CC, Lab/Base, and most of all armoury/Lab) whizkid can be a bit hit and miss. On the other hand, a rapid-fire build probably has the easiest time, of all builds, dealing with shamblers, and an onyx, nano, or firestorm modpack can be absolutely game changing. I'd *never* skip Armoury/DeimosLab if i had a rapidfire build with a plasmagun, it's just too east to get a game-winning modpack out of it! It's practically your prerogitive as a rapidfire user! You'd be surprised how easy the game becomes when you find a nuclear plasma rifle in the armoury, and firestorm-tech-tech-tech-power mod your standard plasmagun!
Whizkid aside, I find it more notable that you didn't take any ranks in Triggerhappy - is there a reason for that? I noticed you took all 3 levels of finesse, which is great for dps, but does nothing for ammo efficiency, much like triggerhappy!
If it's to do with the fact that finessex3 is such a *massive* increase to damage when you hit level 12, then I'd suggest getting finesse at level 12 - another level of SoaB doesn't really make much difference, but I can appreciate that you were undergoing ammo concerns at the time!
Personally, I find that while finesse does indeed give massive damage/second increases, I tend to prefer making single salvos do as much damage as possible in a single turn, as it seems a better defensive strategy to kill a target in a single round, but this might be a more player (or nightmare)-specific thing, I'm unsure. Either way, I'd not completely neglect Triggerhappy. Have you used it and just not found it to your liking?
I also agree with the veteran platinum suggestion, but I'd add that, having skipped a few special levels and their rewards, it might be nice for you to go for daredevil platinum too!
Congrats on the win anyway! Especially the ammo restocking idea on hell 7- that's good thinking-on-the-spot. Well done!