The best way is as follows, but make sure your music skill is NOT higher than 100, or you will increase the chance of success and lessen the chance of gains:
Peace - you can sit in your rocking chair and area peace until you hit 120
Provoke - harder, to get to about 90 try cyclopses and titans... then get a tamer to tame some cu sidhes and put them in a prepared area in a house so they are separated and can not actually attck each other. You can then provoke A onto B, B onto C, C onto D, D onto A etc. I managed to get to 120 by doing this.