I'd bring up your ALC and LTH to level 15 then add GSM and bring those 3 to 20 (picking up BSM along the way) then on to 25, picking up ARM, and then all together, going up 5 levels at a time on each. Having DoL jobs helps also. The reason for this is you'll find that they all inter-relate extremely well when it comes to the mats you need for the repeatable leves. You can also cut down on the amount of gear you need at any one time. Makes it easy to HQ that gear also.