It's a a good build and you won't be lacking mana regen, but I highly recommend having the Merc Treads as a more staple set of boots, given the fact that CC and MR are more important in a lot of cases compared to armor/dodge. Despite being good, you could review having Exhaust since you already have one of the better slows in the game.

pretty standard buils but works nice
also i would recomend to max the q last since the major part of damge from this ability is the farming, i usually go this way R>E>W>Q
also i prefer starting with some health regen (to build at the first trip back to philo stone) and 1 mana pot to help last hitting with Q and harass wih W

anyway good build +1