He's probably in the best state he's ever been in also not gonna say you shouldn't but he's a high ELO jungle pick purely bc of the surprising skill curve he has. Ivern has the best if not most consistent ganking and clears in the game which makes him extremely strong, his counter jungle would be considered over powered in most cases, passive on the camp and smite it and after lv 11 or 12 is becomes a 4 second befriending ritual.
Quick guide on ganking with Ivern. Set up bushes before walking into lane especially if u are ganking mid, walk into the lane when you engage or your laners do, press "e" on yourself to negate incoming damage then if you manage to burn enemy summoners or dash related or even cc abilities then you use your "Q". YOu don't need to gank like this every time but its more then likely to work if u do it. Remember your Q is a gap closer between targets and helps your team get in range for autos, once missed or miss used, you basically have to leave.
Ivern Duelling, do not underestimate Ivern in regards to 1v1's, he is surprisingly good at fighting but don't take this for granted :)