The three tertiary stats are:
-Avoidance, which reduces the damage you take from aoe by 1% per 100 stats.
-Speed, which increases your movement speed by 1% per 100 stats.
-Leech, turns a % of your damage into self healing, at a rate of 1% per 100 stats.
Versatility filled a shoes of Hit and Expertise. Versatility never receives diminishing returns (as far as i'm aware) and will always be at minimum a decent stat for everyone, because it's flat % damage and % healing done, and half as much % damage reduction.
Multistrike causes your melee swings and offensive spells to have a % chance to hit a second and third time for 30% damage each. I'm 99.3% sure it does not affect heals.