If a Charm has Life Per Kill or life leech or something.

Does that effect work when your character melees instead of using that charm?

If it has max life or vitality does it give those stats?

All stats apply if the charm is in the main slot (EE does not stack from item to item though ofc). The only stat that works in the accessory slot in enhanced effect.

Last part of sentence you mean accessory slot is EE right?

Also Thank you for the confirmation.

Yes lpk and leech will work if your a barb or melee... And the only charm that will work in the accessory slot is an EE, and that works at 75% of the item I believe.