There is a great guide stickied here up top... one of the better ones I've seen.
About the competing for gear, you should really be alright with MC, and you guys will be questing mostly, so your box drops will be limited (unless you are wanting to kill nameds for AA).
Check the broker a fair bit for cheap pieces of plate... Pitlord Bracers (Tier4) are a good example of a legendary drop that is cheap enough to be used in place of expensive Feysteel plate. T5 (Ebon) is very expensive at the moment, so she may prefer the Darkruned mastercrafted set made with blood iron ore. So, find a guild with a good armorer and you should be fine.
The other good thing is that she will feel fine soloing when you are nto on! That plate is a serious confdence builder!

Good luck!