Just curious, I run chaos/baal/meph/andy runs... how much MF is enough? I didn't know where else to ask this question!

WTs, Eni, Shako and charms. Everything else reduces your killspeed.

What kind of a charm setup should I do?

This is my inventory situation as is..

No need to keep cube in your inventory. And get rid of that LC small charms have better stats generally

The LC is resistances which I need, it caps me out, it's +8 res LC.

Fill with PCombs and mf scs

I'm still getting relatively low tier unique items with 242 MF on gear, no SCs. Is there a threshold for better MF?

Make more runs

I do wiz spike isted to get more MF, still max resists and 125 fcr on hammering. Along with isted shako, enigma and war travs. Kill speed works great in pvm with 125 fcr.