Some Red Mage Fun!

[Hoshi]

It seems like for rdm melee the same things that were good at 75 are still good at 90. Nepharite's set is nice... you might find zelus tiara hard to get (but turban is a fine substitute). Basically haste and double attack are your friends... some acc is nice and store tp is always great. When I solo on RDM I swap between 5 different gear sets: buff casting set (with fastcast and - spell interrupt), int enfeeb set, mnd enfeeb set, melee set, and ws set... I think most of the gear I use is easy to obtain.

[Nepharite]

It seems like for rdm melee the same things that were good at 75 are still good at 90. Nepharite's set is nice... you might find zelus tiara hard to get (but turban is a fine substitute). Basically haste and double attack are your friends... some acc is nice and store tp is always great. When I solo on RDM I swap between 5 different gear sets: buff casting set (with fastcast and - spell interrupt), int enfeeb set, mnd enfeeb set, melee set, and ws set... I think most of the gear I use is easy to obtain.

Haha, I wish I had that tp set for rdm. It was just one already built and shows what you should aim for. (in terms of maximizing haste/acc/att and showing what is available)
But as Hoshi mentions, carrying different gear sets will definitely help you maximize what you can do with rdm.

[Doombringer]

sanguine blade makes life easy against lower mobs, it's decent damage, unnafected by weapon dmg (rock that joyeuse all day) that heals you.. it's effected heavily by int and magic attack, stuff you probably have sitting around anyway.

only downside is it requires war, pld, drk, or blu sub. i recommend drk, as solo you can't really afford to use bergressor anyway, and joyeuse reduces the utility of da a little bit. absorb tp on a job that can afford the mp to cast it every time it's valid is pretty sweet. it'll take some getting used to, but just keep in mind that you can only absorb what tp the mob actually has.

pld is kinda lame now since you get refresh2, not much need for auto-refresh, and we have shield mastery innate.

blu can be good, though it's not my favorite. cocoon stacked on top of phalanx makes you hard to kill.