Whm/Sch hands down is a great job.
Blu/sch and rdm/sch i have no experience with.
Now let's get to Blm/Sch, this job gets so my attention because of people's opinions over it. Some people simply do not like the risk of dying, period. Doesn't matter what job they play. And some people accept the fact that their job will make them to have to XP a lot. (i.e., Thf, Blm, Pld, etc., ...)
blm/rdm, great for enfeebs, and gravity... to be honest if i actually /need/ gravity there's usually a RDM around to do it- weather or not they use it that's another topic. i prefer /whm for erase, RR, and -na to help out that 1 guy that's being ignored.
typically i go /rdm when i solo puddings- but if i don't have the time to sink into it i'll go /sch... yes blm/sch solo on puddings, shocker! the inreased skill lv's work just fine here- bind is rarely resisted, and even my sleeps land. just be careful to not use a strategem too close becuase they aggro job abilities.
limbus, sky, sea, nyzul, assault, all /sch. running around with refresh gear on to stack with sublimation really keeps you prepared. add that together with 1/2MP cost strategem and a few pieces with Conserve MP?
Dynamis? Once. there is too much going on, and in order to not be hit by AoE u gotta stand away from the group and often times miss ballad. plus if you're a good BLM ur spamming sleepga to overwite lullaby, and helping out ur poor rdm's. its not a giant amount of enmity but its enough that if someone messes up /assist, or a mage or 2 is AFK u'll get pummeled in a few hits w/out any buffs.
Overall? I love the job, but I do wish they had something more than just helix's and storms to set them apart =)