What about the fairy placement? I've never had an issue, only reason why I don't love scholar more is because in order to maximize your output you need to control your pet though, which I dislike, specially wihtout the macros that are being added in 1.1.
On another note, I havent personally played WHM, but to top off a tank FAST you need lustrate as scholar, with it, you'll do it just as well as a WHM, good thing about Lustrate is that it is off GCD so you can combine it like this forexample for a extreme situation on a high hp tank (this is overkilling it btw, unless you're like on twintania maybe XD or somewhere where you know the tank is about to take a big big hit) but yeah -> Lustrate->Adloquium->Lustrate->Physick->Adloquium/Physick if necessary, that is a TON of Hps, like it's been said before, you must not forget the shielding provided by SCH. While their shields are great you also find yourself in the position where maybe recasting a shield spells gets sucky if you havent consumed the old shield (cause as we can all imagine it is not utmost efficient) but it works anyway :P (usually will hurt you when or if spamming Succor).
A last thing, you should not have any MP issues whatsoever, unless you either are Sacred Soil or Lustrate trigger happy or simply forget to use your Aetherflow on CD (you should be doing it, unless there isnt much to do and in all honestly casting either of your 3 stacks consumers is a compelte waste). In order to make sure your Lustrate is up for any emergency situation I like to keep one stack until Aetherflow is back up, or about to be.
Anyway, I don't know why I just went completely off topic and said all that but, Yay WHM! :3 I am leveling mine still but I have a feeling I'll prefer it, though I know I'll miss some of the scholar perks.
P.S.: Fairy auto-heal while on Cleric Stance dpsing is the best *-*