For solo go with prophet. As a box u don't really need to level up it hardly just to like 52-58 and it's fine. With warcryer its different story especially with chant of predator 3lvl which u get at 68lvl. And you can also heal with prophet pretty well. Comparing to warcryer it doesnt use entire mana to buff just 1 person.
0:12 - 0:22, 1:02 - 1:12 , 1:26 - 1:27, 1:43 - 1:51, 2:07 - 2:12, 2:26 - 2:30
These are the only actions worth to watch.
(for those who don't know why i'll just point his buff bars)