True chain light does a ton of damage, but if you are trying to conserve mana as shadowstrike is a very mana intensive spell it makes it harder to gank mid game, at least in my opinion. and shockwave really farms just as well as chainlight does, and iwould say it does farm better early game especially chain light of course is better after about lvl 4 and gets better later and later, but the long range, and the low mana cost make it sexy for me and kiting