rank cross class abilities

[Citizen_Thom]

For my Paladin I use the following cross class abilities. I have them in this order of availability.
Fracture (for bleeds to maintain aggro on off targets)
Bloodbath (paired with Fight or Flight for self heals)
Foresight (for an extra 20% def cooldown. i can stack with rampart if need be)
Mercy Stroke (for finishing off mobs/boss burndowns)
Stoneskin (just in case i need to use it. usually dont need it in groups)

Any change in availability (due to level sync). Any alternate ability suggestions?

What lvl to I need to get Marauder to for Mercy Stroke?

I use:
Stoneskin
Foresight
Bloodbath

I have Raise, Protect, but they're just extras because I didn't know of any other cross skills to replace them with.