Currently I'm sitting at 90% critical rate:
30% from Soul Shooter Expert
15% from IA
15% from Phantom Link Level 2
10% from Hyper Critical
10% from Explorer's Critical Ring
5% from Hot Time Hat
I got really lucky a couple of days ago while fusing Nebulites, and two Rank Bs turned into an 8% Critical Neb. I've been contemplating using it, but I really don't know what to do.
Option 1 (my first plan): Re-cube my Angel Emblem (it's currently 3L Legendary garbage) to 12% Critical Rate/x/x and hope for decent lines. This way, if I ever get rid of my hat, I can grab a Marksman Character Card and still have 100% Critical Rate.
Option 2: Stick the Nebulite into my Secondary Weapon (currently has a 15% PDR Nebulite), and grab a Marksman Character Card.
It's also worth noting that I currently have no plans of replacing my hat, but if Nexon churns out a very good replacement, then switching it out is worth considering.