How to make a balanced Assassin IMO

Riot has stated several times that in order to make an assassin balanced they want to make sure that the assassin is awarded for getting ahead without snowballing, but not being useless if they fall behind. Here is my idea.

1.) The majority of an assassins kill power should be on his/her ultimate , , follow this rule...sorta

2.) This ability should have a lengthy cooldown no champion I can think of really follows this rule

3.) Assassin should be melee pretty much every assassin follows this rule

4.) Their Q,W,E abilities should have little kill potential on champions, should instead apply very light cc (slows, or unique cc effect), or escapes/engages (That aren't too fast), be useful for farming minions, etc.

5.) Most importantly, the above shouldn't change MUCH as the game progresses, no matter how fed or behind the assassin is.

Ideally here is how a good team fight for an assassin should go. a.) Use ult to kill a priority target, target dies b.) Your team is now fighting a 5v4, instead of a 5v5. c.) Use your abilties to deal bits of damage and apply cc and/or zoning to other targets to finish out the fight

Lets look at some assassins in game right now.

- Ult certainly gives him the majority of his kill potential IN LANE but once he is fed he can kill you with his W, E, Q just as easily as his ult. The delay on his shadow clone gives him some predictability but the fact that he can instantly blink to his shadows can still make him hard to pin down. His ult is on a VERY low cooldown come late game (60 seconds) which with 40% cdr items and an additional 15% from ultimate hunter makes it less than 30 seconds. That means that he can kill with the ult. Do tons of damage or kill with his W,E,Q, and then ult AGAIN very soon.

- His E is basically a get out of jail free card because of how spammable it is. Once again makes him very hard to pin down and he can gank any lane unexpectedly. One good thing is that the wall gets put on CD so that he can decide to use a wall as an egage OR an escape, not both, but the pathing for determining what makes "one wall" is awkward sometimes and lets him leap twice on some walls in jungle. No cost or cd to it as well and I would love to see some sort of mana cost that increases with each cast (like ult but not as costly) so that he can't just spam it so much. His Q can deal a TON of damage once he gets his items together and can even crit so yay. His W only slows on the way back and the short range makes it tough to ultilize properly. It seems like it wants to be an escape tool but Talon already has a nice one on his E. His ult is once again on a very short cd and it very useful as an escape as well. Not as much kill potential as Zed but I think this guy might be even more difficult to pin down in the right hands.

- His passive leap IS his gap close which might suck in lane but in jungle is fucking perfect. It has no CD and is still activatable shortly after exiting brush or stealth. I would like to see some sort of cooldown on this passive if only to stop rengars leaping from a brush and then running back to it just to leap again. Ult is still on a very low CD.

Do we see a pattern here? None of these champions follow the above formula. They all have decent or better damage on basic abilities, their ults help them kill but are not super necessary, and they are on low CD's with the CD that can be gained from items.

The only one that i think actually follows this idea just a little bit is Pyke.

His Q is his CC'd, a slow or a pull. His W lets him gap close or escape but not super suddenly, his E is also a gap close/escape that can stun, his Ult is his major kill potential. The only problem I have is that the CD on his ult is still pretty short and you get to recast it for free if you kill with it

just an opinion. Just had a game where the enemy smurf Rengar went like 40/1 and kept saying that our Xayah can always counterplay him by ulting whenever he leaps, except that his leap doesn't have a cd and Xayah is burning her ult to save herself one time but whatever.