First you like to focus on farm to get fast 6 and after you have ult you want to focus ganking you can gank early if easy and sure thing but mainly after 6 cos you power spike at 6!
Always make sure in TF's when you go in your team follows so no stupid W+F in with ult if you team cant follow you are not that OP!
and wards are good to counter ganking.
try to always bing or chat before your gank to make sure your success!
This build works nicely in low elo i'm silver IV!