I laughed at MP whoring WHMs... Namely Tarus. Some Humes and Mithra's tried to match that too, but the problem everyone over looks is "What good is a dead WHM because of an AoE?" Your HP is so low that you just got killed by two Hurricane Wings. Good freaking game.
I went for 1000HP and 1000MP as a Taru WHM. I was able to take many hits and at one point "tanked" Fafnir because of a Curaga. I lived too. While it was a mana burn trying to keep me alive, I wasn't one shotted. Swapping gear is truly easy.
I must add, it also takes alot of money. Not everyone has 20mil in gil to switch equip. Where do you find all those max MP gears? Zenith set (5mil each), RSE2 (for Elvaan & Galka 3mil-5mil), Astral Earring (10mil), Serket ring (25mil), Healing Staff (almost 15mil I think). So what the hell do you want to maco? I can do the same job as eveyone without any maco to switch equip.
You don't need a crap load of stuff. Don't even bother wearing any zenith unless you're a Galka or Elvaan (This is not directly pointed to the person I quoted). Especially if you're a Taru. Any Taru wearing any Zenith (excluding hands) should be shot. Humes/Mithra can get away with maybe two pieces. I remember testing my HP and MP limits.. Hitting near 1500 MP...... 300HP. YES! I could stub my toe and die.
Seriously.. As a WHM, you only need:
Errant Gear (Enmity is underrated).
Noble's Tunic macro'd in alond with Light Staff. The 50 MP bonus from that staff is nice, but when you consider it, it's really only an extra cure III for the ever so insane price for 20mil...
Dark Staff (Macro'd in with Errant body).
Anything under a short fight