IMHO, don't even look into doing 2 or 3 stars without first max all your classes, and your HQ AF gears melded to 391/374/354.
You can try to do some 2 stars, but whatever you make will generally cost you a lot more because you will need to use HQ mats more frequently. When profit is already low at only a few K per HQ item, last thing you need is cut it down even more.
Crafting isn't like DoW/M where you can level just one class and get BiS gear. To do 3 stars, especially if you want to HQ them, you will need/want ALL your DoH at 50.
