google dont tell me exactly what im after or im just not comprehending the gamepedia explanation
whats the max speed mod for rare

ring/sceptre/shield/amulet

trying to figure out if i should keep randomize caster mod in harvest

google: poe affix

it shows you!
overall, 0%cast speed works best

ok so maby im understanding it right
it says my rings are probably only gonna get 7 cast
my shield and amulet can get 13 , scepter might get 25 not sure if thats right tho

trying to max the cast out of my gear

7 max for amulet
13 max for scepter

it can only stay within it's same Tier Roll per category
Poeaffix.net

ah ok then thanks for that , im not up on the crafting as i usually just buy new gear

alot of the time it's cheaper to just buy gear,
just keep checking poe.trade
sometimes you get really good deals

so if i was to harvest craft "remove caster" could i then add a caster of higher tier?

in theory yes, but obviously rng is involved etc

ok last question i hope

on my skull gyre ring , the cold damage to attacks and the increased cold damage are they both physical modifiers?

got remove random physical mod and dont wana risk losing the increased cold damage