This is the most important part of the whole guide.First thing you should know is.never initiate combat without having the 5 ferocity.if
you have been following this guide or very similar.you want to harras the minions and possibly the champs until you have your 5 ferocity then hide in bush(the enemy will most likely see you enter so dont sit in an obvious place only to get hit by there harass.When an enemy champs comes close enough ( make sure you and your lane partner have decided which target to focus.you want to focus the squishiest first.) you use your auto leap from cover(auto attack) then you q/q/e/(by this time they will be running if it went well) then u chase em down and finish with w.But do not chase if your partner is dead from the other lane enemy,you wanna turn and handle him, and if the other enemy comes back i would say run/or if you have exhaust just exhaust the one with more health and finish the weaker then kill the other or run if need be.This strategy is for before thrill of the hunt.Once you have your ultimate.you make sure your partner is ready and let them push then acticate thrill of the hunt.(they will most likely back off.) follow them until you have 5 ferocity then jump and repeat.(always finishing the squishiest enemy first.thats all you really need to know.play safe.dont initiate without 5 ferocity and you can also use thrill of the hunt to escape.but make sure to hit r about 25% or you will die cause it takes a good 1.5seconds to activate.One last thing.(Rengar can take out turrets at incredible speeds,if you use his q/then build his ferocity and q/q)And if you just come out of a fight with champ and your low on health or your just slow regardless.you can build your 5 ferocity and use your w healing you a decent chunk, disabling the harass of the enemy and giving you great lane sustain.