The WHM fight is pretty easy as long as you're properly prepared. I promoted 2 storage mules to salvage helpers over the summer and did both of their Maat fights in full AF along with a few AH bought accessories, an NQ elemental staff, some ethers, yag drinks, vile elixir, and emergency echo drops. I didn't need most of those, but better safe than sorry.
I cannot stress enough having your Divine skill capped for this fight, and this may be deal breaker for some people. I took no damage during either fight but a resisted Repose would spell trouble to someone with low healing and enhancing skills. Skill books and colonization reives worked pretty well for raising Divine skill.
I could see the advantage in not wanting to spend a lot of time raising skills before the fight, casting spells and waiting around for MP during the fight, but it is a pretty easy fight overall.
____________________________
http://ffxi.allakhazam.com/profile.xml?73417