I search and search for these seems pindle and frigid are mostly where I find them is there a MF formula that has a better chance of dropping fools/cruel weaps?

Den of evil a1 normal ez

ive had best luck nm/hell doing shenk/pindle/trav finding good rares

d2jsp

How much mf needed for good find there?

200-250% mf, for finding more rare items.

High level areas, for every drop to have a chance of spawning those mods (mostly : any place in Hell).

Try to gamble with the appropriate level for the mods you want
A level 50 can gamble some pretty impressive fools weapons if you dont need them to be eth

non eth = non expansive

Some builds really dont care at all about eth
A fools 40ias pb with 2os and mods can be worth a few thousands for exemple
Same with some claws

Any class who needs ias and ar but doesnt care about physical dmg (melee sorc, fireclaw, dreamer zealot, bearsin, psn dagger necro lolz and more)

can you gamble eth items?