I'm looking for information on White Hand Gems

Recently returned to the game and feeling a bit overwhelmed by new weapons, especially regarding the White Hand Gems from SG.

I noticed there are several elemental types (Fire, Ice, Lightning, Holy) and multiple variants for each, such as Cloak, Strike, Storm (and possibly others).

Could someone kindly explain how these different variants work and which gem is recommended for each class/playstyle? Any insight would be greatly appreciated!

variants:
-strike = single target proc on melee attacks
-storm = small aoe proc on melee attacks
-cloak = retributive proc when you are hit (the only one that does something for necro/demo/pom/tos

elements:
-fire = fire damage with a small dot maybe ? pretty bad.
-electrical = i don’t remember but it’s also pointless.
-unholy = some damages and applies a healing debuff of some sort ( i think )
-holy = some holy damages and heals you a little bit.
-ice = the juicy one ! some damages and applies a big snare that bypasses snare immunity and applies to EVERYTHING (players in pvp, raid bosses, etc…). legendary gem and epic gem procs also stack !

Ice gems are probably the only real good ones.

Thank you so much! This is extremely helpful and clears up all the confusion I had