I played him a lot now, with this build you can play solo lane or with mates...the W skill has a huge range and you never need to think about your mana pool, so use it.

This build is for ultra huge damage! If you play this any good you always get one down or at least deal so heavy damage to all champs that your team will have a BIG advantage in teamfight.

this whole critical burst damage is for instant kills, actually i am pretty sure i never lost a 1on1 with this build. Most important item at start, Ghostblade!
engage with e+q, ulti, w...1 attack....if your enemy is strong use exhaust also.

in teamfights you can also engage, with q rdy, jump in with e, ulti walk out...huge damage to all nearby champs, or you focus one out and get him down, flash out.

in teamfights you need the right timing, because you go down quick.
This build is really just for huge damage! if you engage 2 opponents anywhere with a mate, go in, kill one (or do epic damage) and leave the rest to your mate...for sure you stay to slow others.

how you skill is not that important, as soon you have infinite edge, skill E!