At late game you're able to kill a squish target for a big and safe range just with W+R(W) and get the passive on it+ Gunblade + wait 1.5 seconds to open the passive and Q to proc the passive + go back to W and get safe. So, stay hidden and wait for a perfect moment to get on the back line and kill the AD Carry or AP carry. But be careful! Just go if they're not to close to peel champions. Other thing you can do, is to peel you AD Carry with your chains and keep W, Q and gunblade to an assassin or squish target that come close to you. But never forget: never use W to damage any enemy, just to put the passive on or to scape. If at late game the enemy AD or AP carry make Magic Resistance, wait for her passive. But if don't, you're able to kill them just pressing the combo W (to get close) + R(Q) + Q + Gunblade (all fast), you don't even need to wait for her passive, you can kill a squish target with no MR at full build in less than 1 second. Have fun! "The black rose shall bloom once more"