Well, I got mantis, dragon, tiger, and swallow stances to 100%. I never could get Monkey to budge one bit, so can't really help with monkey stance.
Pretty simply with Dragon and Tiger, they were the easiest to get up, all you need to do is just fight mobs and deal out the damage. Dragon might have a defense part too since it reduces damage as well as increases your damage, but that's what I did pretty much with these two.
Mantis I did the crab tatic, except left my weapons on. Go into a room full of mobs and do a area effect spell / skill and just let them hit on you.
Swallow, same with Mantis except I took everything off. dodge helps too.
Hope this help. :)