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DrMurloc BS will drop less you if get more crit as well. Parry or Full Absorbs = not losing a stack if its off ICD to lose a stack.
Rune Tap wasn't really fun. It was just a CD you have planned in your head for X mechanic. Using it after you take spike damage you might as well not have used it.
As for how the other tanks play.
War: uses SS, Revenge, Spam Dev and use rage on IP for a shield 20 to 60 rage for shield size.
Bear: Moonfire dot, Mangle, Trash, afk swipe spam. Spend rage on Ironfur or Ursol if you need magic reduc instead both are 45 rage. Also has FR 2 charges longish CD heals for 50% of dmg taken over 3 sec for 10 rage.
Monk: hopefully no one subjects themselves to this class.
Pally: Judgment, Cons, BH, AS. SoTR for shit has 3 charges so you can hold for longer duration chain if needed otherwise just use it when needed etc. Has a heal based on missing hp.
DH: Spam generator, immo aura on cd, leap on cd(added talents can be rotation buttons Fel Blade and Fel Eruption). Soul Cleave to heal and heals more with more souls which are procs.
BDK: Marrow at to 5+ stacks and keep it over 5, DnD on cd basically, HS, BB don't let hit 2 charges. DS to heal or multiple in a row for max dps once you get golden trait.
Most are pretty similar-ish. Diff skills or way to get resources. Ya most have a spammable button that does about 41 dps and doesn't really do anything. Rather have all my spells actually do something and be slower but scale with gear because of haste and crit allows more spamming because of parry.
PS: those skills are not in any particular order of importance in the "rotation" of each tank.
I don't really have a strong opinion on if we should have kept IBF or not. Class feels fine without it and will be maining again after I left it when HFC started.