Axiom PROXY - just trust me, best throwing putter - straight, glide, not too touchy, just laser straight. Plasma has great grip and looks nice - Neutron is a little firmer (but not firm) - and Neutron Soft is a lot like plasma just a different feel. 3/3/0/0.5 is kinda how I'd rate it. It can eventually work into 3/3/-1/0 but that takes a long time. OR Try an MVP Atom - similar but a touch faster and a touch less glide than a proxy and a lil more stable like 3.5/3/0/1 - electron is a nice baseline and works into floaty laser straight, Proton and Neutron are more stable in general but acts like a speed 3.5 Buzzz - great disc too.
PROXY, ATOM, ENVY, then more OS try a Streamline STABILIZER which is like 3/3/0/3 - of all the discs I've tried these throwing/approach putters are standouts as the best to me