Like Jakuk says, finish Adoulin and RoV before you do much of anything else. The various KIs are nice the the CP bonuses are the biggest reason.

Of the jobs you have, I feel like BST will be your best get-up-and-go to get solo things done. However, it's not desirable to most parties as pets only get particular buffs. If you have charmer's merlin, keep it, but it's about the only non-ilvl weapon worth it anymore (even kclub is just a novelty).

BLMs, once fairly geared, are really desirable to groups because a common strategy is bursting off SCH skillchains. (Make sure and check out Spaekona's Coat +1 and how to get it, great for solo and in easier situations).

Empy WS are now available to all weapons if you unlock them. Definitely do that for Myrkr and CDC if you don't already have them.

I'm not ignoring your BLU (I love BLU), it's a good idea to gear it but it's probably worst starting out than your other jobs.

As for gear, talk to the taru in Mhaura about Ambuscade. You can get some decent starter gear via that. If you manage to +1, some of the gear (usually 1 piece per set) is stand out, top notch stuff.