I'd think prod on MA ulm would actually be... somewhat of a waste? More order would mean more of those resource producing critters (via gold) would mean more resources in the provinces you actually need resources in. And you want oodles (like, seriously, get castles, ooze smiths from your every pore -- this is one of MA Ulm's primary goals, from what I noticed) of priest (IB spam) and master (everything else) smiths anyway. More growth and luck would also mean that (plus all the nice stuff luck helps bring about). Growth would help a bit with your kinda' old main-line casters, too. Prod would give you stuff you can get anyway, y'know? All that gold means more spies, too~
Drain is probably a really good idea, though -- MA Ulm's MR is generally kinda' terrible, from what I saw, and some drain would help counteract that. Prooobably not drain 3, though -- iirc, that opens up some pretty terrible events.
Not sure I'd go so far as to take sloth, but neutral on the prod/sloth scale? Maybe. You do probably want a minor earth bless (everybody wants a minor earth bless, unless they have both no sacred casters and no access to astral for shrouds... maybe even then, since S1 indies are kinda' common) for reinvig on your IB spammers, but nothing beyond that. Seriously the only sacreds you have are the two casters and a H1 priest. Consequentially for that, you probably want your dom as low as you can stand, since you're not pumping out sacred troops (because you don't have any). Burning some for more order/growth/luck (i.e. gold) would probably help offset that with more temples, as well.
And yeah, some diversity would be nice. Your pretender being able to forge some combination of air/fire/astral (and the air/earth would give you elemental staves, eh wot) boosters would be a pretty big deal -- it'd let you get a lot more out of your native randoms.
E: Enough astral to boost your pretender up to gateway casting (S2, with coin then cap, assuming you've got that minor earth bless -- otherwise S3 and coin or cap. You probably would want the S3 anyway, for base mind hunt immunity) would also be a pretty good way to eek out some mobility for your armies.