1. you must be at least rank 4
2. when you are fighting a monster,after you hit,use prepared strike ten imediately follow by using decisive strike.
3. if done correctly you are guaranteed to do a crit.
4. you can do this multiple times during any fight(makes soloing a LOT easier)
5. if you are rank 6 you get 5 mana back each time you hit a crit so ur basically a powerhouse of awesome
(srry if i didnt explain it good enough,if you have any questions pm me)