You should try evolving w first, especially in the jungle. The sustain is really good and the utility on the slow is amazing for ganks. Problem with evolving q first is they have to be isolated for it to have any effect really. Most of the time they are around minions and you won't really fight anyone isolated til long after lane phase.
Lol i used to run tear on panth but then just switched to flask. Its faster and saves gold but ya his ult is really good regardless. Him plus shen plus TF and some teleports makes for a good mobile team comp