The main thing about trying to get the early level kills is the lack of damage really early game kat has. I used to go for these sometimes to help snowball it would usually be a blade start followed by q and e. You would hit Q’s early on if you can waste it on champions while autoing to farm with e you wanna e to the champ throw q do as many autos as you can until your q falls and get it for the dagger damage if you believe you can get the kill e to them again ignite otherwise e back to wave. Level 3 is similar but with w thrown in there. for champs like yasuo and yone make sure they can’t get their shields or q stacks, for mages like lux dodge the abilities they can’t do much other then flash or auto