A few things.

First, leveling roulette is, at level 60, worth a mere 5 lore. I'm not entirely sure about everyone else, but lately if I'm in a lore crunch I end up skipping leveling roulette entirely. That 100 esoterics, on the other hand, is pretty valuable right now. But I'm going to admit this is just picking for picking's sake.

Second, as far as setting up. Healer queues are rarely very long, but I tend to squeeze my time when I can. Ideally, I try not to if I'm healer or tank. Still, it can be a fairly bad scenario to switch jobs to commence, out in the field, and be loaded into the instance with everything still on cooldown. Even if you're ready, Protect and Stoneskin take a fair amount of time to cast. Personally, OP, I tend try my best to buff before or as the gate goes down. If the tank bails before Protect goes off, I don't bother casting again. I figure if people want their mitigation, they can wait for it. Alternatively, cast Protect during the first pull when you've got the tank's health at a manageable level.

Third, I really don't advocate going on a power trip, but if in doing my best, things fall apart, I advise the tank to take things a little easier. They learn the same lesson either way, but this way they at least can't pin you down as failing on purpose.