Re: pure light mf
I see now, there is a slight improvement with Vipermagi with FCR (when using lightning), but it is very, very insignificant, almost unnoticeable. I'm not sure if it's worth it. It's probably something that I'd prioritize very low.
use an amulet with FCR
use a ring with FCR
use armour with FCR
use a rare/magic circlet with FCR
use a weapon with more FCR
Such a an amulet would be spendy, I cannot swap out my SoJs, since i need the +skills, switching out coh with a FCR armor would leave resistances miserable, switching out Shako would leave MF miserable, switching out Occy would do the same, plus I would loose the +3 skills, so no, I am not missing your suggestions here.
I may (or may not) have found a work-around, though. Shako + Occy + coh + wt + magefist + maras + spirit + arach + sojs. This doesn't give me the 117% breakpoint, but it gives decent kill-speed and decent MF. Put Ist in both shako and occy. The resistances will be maxed as well, however I found out that it comes down to three deciding items: anni, torch and maras. With a +20 res all torch, and perfect maras, the +res stats on anni would be irrellevant, since they would be maxed regardless of it being +10 or +20. You could probably try mixing it up with something like +18 torch, +28 maras, then +14 anni. But then again, a 10% bonus xp anni is probably more important than the +resistances. If this setup had just +5 more res all, it would be as close to perfect as possible (except for the 117% FCR).