Id use exhaust or surge if you think you can handle the get away without using exhaust. its all up to you.

This build is an odd build. You build mana, cd, and as. the mana helps you stay in lane longer and not go oom when your using your frost arrows and spamming your volley. theres no real skill sequence... you just want to spam volley every time its down with the cd when fighting other players. you also want to keep your frost arrows on so they dont get out of range. in lane use your volley once to weaken the minions, take out the casters with your b/a and then volley the melee minions and b/a them if they don't die. usually go positive, even with a rando team. just don't be aggressive and dont fight with out someone there. dont try and solo ppl unless you have ult up... and! HAVE FUN! (best build ive used)