How to get your hp up quick as zed with no life steal or spell vamp

Ok so a few minuets ago redmeecy up loaded a video on mid smite zed and its a good strategy and I would like to tell you my idea. So you have smite and you lowish on hp what you do is keep the enemy's red buff warded and when it's up you just smite the red take the scuttle bub and come back in to lane on fullish hp is this a good idea and any one want to expand on it pls do Ty