hmmm i think this may be because elementals arent the best choice in mob for a WAR, to a RDM understandably they can silence bind and aspir them and if all else fails just kite them all over the place, but for a WAR this seems crayz, try some plantoids or some bats or basicly anything that's not melee resistant or casting, u'll have a much easier time. I believe every job can solo xp you just have to pick an appropriate opponent, for MNK its obviously bones, whereas for THF bones are the worst kind of mob mess around with some easy prey of different types you'll see what i mean 
as for WHM, i wonder if you could take /RDM and some drinks, and maybe try kiting bones? if not maybe experiment with /NIN and dual clubs on them if stoneskin + utsusemi is gr8 defensive combo, i know some WHMs that sub THF too sometimes for SA + energy drain type stuff although i cant really see THF helping u through dc or higher battles; but then i really despise /THF
kinda biased like that.
