I have had problems with this as well but figured out a solution to have almost all your health after 3 camps. The best thing to do is to take hunter's talisman and 3 pots. Clear your buff first if you are against lee sin, shaco or somebody else that counters hard or there is a 90 percent chance they will kill you before you get to the third camp (most bot laners leashing for you will understand and not care).
If you want scuttle (preferable route), take q second instead of e because the knockup will reduce scuttle's armor a lot and make it a fast clear. By hitting scuttle you get a ton of health back because of talisman's passive. So you won't need to pot up before fighting it.
If you don't want to take scuttle you should clear the 2 small camps and clear the buff camp third. This will allow you to be healthier after 3.