this build is amazing for chasing thanks to gunblade and botrk it has good damage output from dusk and dawn and you are also tanky thanks to zhonyas and wits end + your R

you can replace botrk if theres no tanks in enemy team and swap it for some ap item like riftmaker or rabadons

dont waste your e it has a high CD early you should use it wisly

when ganking you shouldnt jump on enemy with e instantly its better to jump behind them using a minion or even a ward then use your e they cant flash back to tower or they will get stunned and either die or have to recall