User blog comment:Aruvin19/Who should I raise first?/@comment-64.231.48.151-20150927140408/@comment-76.244.76.110-20150927175415

One of the best? Mmm... Let's not get ahead of ourselves.

It would depend on the need you have. If you don't have a unit with a Crit Dmg % or HP up LS then I would suggest Colt to be the one you upgrade as you're going to get more use out of him. The problem with that though is that there a lot of units that outclasss him in terms of everything crit related. He's a solid unit but as someone mentioned, both are outclassed but Tazer holds his uselfullness as the units that outclass him all do the same thing of massive damage to a single target only with more damage.

Tazer would be good to unpgrade if you need a solid unlimited SBB unit that does pretty good damage. But that's really only where his usefullness shines, other than that you'd better with other units to fill his place.

tl;dr Upgrade Colt if you need crit and a little BB buffer with a pretty okay LS. Upgrade Tazer for things like raid farming and single target stuff.