Really rough idea for a new champ

So I saw a video this morning about "a possible new champ 'The Summoner'" and it got me thinking.

(Please be gentle, I was super tired and jet lagged so it all sounded like good ideas at the time)

Soul Pet/Summon

Basic skills until level 6

Pressing R followed by Q, W, E or R again will summon a different "soul pet/summon" that shares HP with you, whichever pet you choose is the pet you'll have the rest of the game, also changing the skills Q, W, and E, (and possibly R, since once you choose a pet, the ultimate opens up) to go along with each pets differences.

Q is an AD ranged pet, W is an AD melee, E is an AP mage, and R is either tank or support, allowing this champion to be the ultimate filler champ.

Depending on what role you choose depends on what build path you take.

Since it is a "Soul pet/summon," it somewhat shares HP with you, as you take damage, the other takes a percentage of that damage, vice versa, if one dies, the other still has a chance to survive, only being able to bring the other back by going to the well. While separated through the deathly one, damage output is greatly reduced.

One way to make the main champion and its companion work together could be R (ultimate) make the skills Q, W, and E have a shared effect that comes off of the champ and pet, with a decent cool down so you have to choose when to combine skill power.

Or R isn't a skill at all, just a way to move your companion around you a set distance.