A New Mid Lane Mage Idea

So just to clarify, I'm absolutely terrible at the game... but I do love it, the champions and the world, so one of my favorite pastimes is making up new champions. I'd finally found the free time to post about a few now and again, so to start with... Galavin: The Risen Lord (the name and title still in development). As for his skills I'm mostly still working, the only thing I've really thought of is his major theme, which ties into his ult. So I know that riot is against pet focused champions, but petcentric champions are an awesome concept, so I decided to take a crack at it with something more... undead focused, I wanted to create a champion that was a proper necromancer style champion by using some of the capabilities or concepts that exist in the game already.

I wanted to utilize the some of the things like ult, / ulti, he has it at lvl 1, but like jayce he can only have the one point in it, it activates like heim's though. He activates it and it replaces his three main abilities with three choices of summons, each with it's own capabilities; like more damage, more tank, or maybe one that heals him as it deals damage. Each summon has it's own special power that is activated by pressing ult again, the only way to summon a new one is to let the current one die, let it's timer run out, or sacrifice it for a small heal. As you level up your basic spells, it increases your minions power, the best way I've found to balance it would be that the summon uses HP to cast (along with all his spells), and being damaged yourself damages your minion too. It means that assassins can't burst ya down without fear of the summon, which seemed fairly balanced, but does mean that Galavin can abuse range and poke.

Anyway, this is about all I have so far, a basic concept and theme... I'd love to hear feedback and/or ideas for his other abilities, I'd also love to hear how his overall concept sounds. I would say, that since he uses HP to cast everything, a capable or reliable way to heal/sustain would be useful.

In anycase, thank you for taking the time to read this and thank you again for any feedback, and have a wonderful day & next game.