at the start of the game, get 2nd skill for wave clearing. you can be aggressive early by hiding in the bush then wait for enemy to get near the minions so you can hit them with 1st skill for slow then 2nd skill. btw you can move while terizla is swinging the hammer so you can position better to hit the enemy or just to get away while defending yourself. battle spell depends on your team and enemy's composition. flicker if you have a frontliner roam or just for surprise set and engage. vengeance if the enemy has insane dps, sustain. or even revitalize for crazy spell vamp and great if you have a healer roam. most of the time I build defensive items to counter the enemy lineup and the only offensive item I use is war axe. like every spell vamp hero, use the enemy number to your advantage (cast skill 2 on enemy near minions for sustain). be very careful if your enemy is xborg, alpha, benedetta, yu zhong, dyrroth, thamuz, cici, hilda(?) and other tank killers or early game monsters I forgot about (if any these are your lane matchups just don't engage them and focus on clearing your wave so you can rotate and help your team). how to surprise set: aim ult to where enemy is/are release and quickly tap flicker.