I'm running Pa/MMM/Pr or W/MMM/Pr (depends on my mood :o).
Except for some initial difficulties with Krastinov (aggro reset + enrage) I do not struggle in any instance.
It's far easier to farm instances with a paladin instead of warrior.
I really like running scholo... easy trash, average boss difficulty, high value loot (runes are 10g on my server :o) and lots of items to disenchant.
For peeps having issues with Ramstein... tank him on max range and intercept once the stun fades > taunt > back to max range.
If your dps' are average equipped you should be able to kill him on or before 2nd stun.
Also warriors... don't forget that you also have a secondary taunt in battle stance which lasts longer than the normal one; easy to get 100% aggro for 10s with it.
Lol, pretty weird strategy, but if it's working for ya... :D