Get Barbed Needle has fast as you can and then get block and boots. From there, follow the build chronologically. In the fray is very useful when tanking jungle or helping your ally tank jungle, be liberal in using it. Use foesplitter conservatively until you are sure you will have max rage. It will help clear out much faster as well.

This is an interesting one. Max into the fray first to give your team max damage reduction and some form of crowd control. Foesplitter isn't a necessity and should be not overdrived. Get iron guard first buy, and then rush Crucible. Then get warhorn. After that get fountain and then boots; from there, follow the build chronologically. Make sure that when you are tanking minions for the jungler to use into the fray. Its damage reduction is very helpful.

Not much to say here. Buy the build chronologically. If you are laning, then use into the fray and foesplitter consecutively for trading. If you want to ult, then use into the fray behind them so that you can slow them and get as much damage as you can from the ult.

Rush barbed needle then get tension bow. From there build chronologically. For engages, use into the fray behind them for slow and then auto attack until they are just out range. When they are, use foesplitter twice and as fast as you can. If you are quick enough you should be able to get the full damage off. Play passively until level two then use this technique.