On progression I can't see the 2nd breakpoint being attainable for anyone but the luckiest of players, you'll be lucky to have 14.5k spirit if you didn't plan in advanced and grab the haste pieces from ToT, from simple reforging. But with the amp trinket and even just full normal gear, you can easily get the 4th breakpoint and 15k spirit, with all the gem slots still open to play with, so if all you want is the 3rd you'll have no problems getting high enough spirit.