Rengar players, what are Rengar's most and least important mechanics for you?

Whether you want it or not, Rengar will in all likelihood be tweaked heavily in the foreseeable future, likely during an Assassin Class Update. Given the sheer amount of mechanics on the kit I think it's a fair guess there's a few things that will be shaved off.

I'm curious what the actual Rengar players are most attached to and why. Put as many of the items bellow as you like in order of most to least important and discuss or whatnot.

• Bush Leaping
• Ferocity Management
• Cooldown Resets
• Throphy-Stacking Rewards
• Attack Reset
• AS and/or AD Steroid
• AoE Damage + Defensive Steroid
• Heal
• Skillshot Slow
• Skillshot Root
• Stealth
• AoE True Sight
• MS for Initiation
• Reliable, Unconditional Leap
• Combat MS
• Ferocity Generation Steroid on ult.