Unit suggestions
This is going to be a list of some of my ideas for characters in TFT.
Guardian + Brawler. His mana bar could be damage reduction and making him more tanky. Could also be a knock up.
Robot + Brawler. Robot skin, his mana bar is the Tears. It does AOE damage around his location. Meaning, he would have it at the start for a X amount of time until recast.
Sorcerer + Shapeshifter. Ult summons Tibbers as a Unit [Like elemental].
Ranger + Blademaster. Ult Summons 2 soldiers that attack the same unit as Azir.
Glacial + Sorcerer. Snowday bard skin. Acquires meeps that stack so long as the unit is on for ult. Max 5 stacks at lv1 unit. Lv2 10 stacks. Lv 3 15 meep stacks. Meeps give AP damage or attack speed?
Hextech + Ranger. Ult is 4th shot, guarantee Crit on attack with additional damage.
New class introducing Poison stacks on AA? + Sorcerer. Ult, Paralysis units in a cone for X amount of time.
No ideas sorry. I was thinking Hextech just not sure the other option.
Pirate + Sorcerer + Blademaster. Dark waters skin. Ult gives Diana a shield, dash, and refunds half of mana bar?
Glacial + brawler. Frozen prince skin. Ult could either be an AOE burn around him or a warmogs like healing factor.
Hextech + Sorcerer. As for ult could be aoe damage around location and a refund of health bar by a percentage?
Glacial + Sorcerer. Frosted Ezreal skin. Shoots a blast across the field at an angle.
Phantom + Elementalist. Ult is crowstorm. Or throwing a crow that bounces between units, those effected can not use mana bar for a small duration.
Yordle + Blademaster. Either his ult could be like it is in the actual game.
Knight + Hextech. Hextech skin on Galio. Ult gives ally with lowest health on field a shield and galio launches then lands near them applying a knock up.
Maybe glacial with the Arctic skin? Maybe ranger and he throws out the kegs, but I think something brawler would be better. Ult could be the keg that knocks enemy units around.
Phantom + brawler. Charges through enemies applying burn to those in the path.
Hextech + Yordle. For the Ult I think it should be reflected by what OTHER hextech units you have in. Say for example. If you have Jayce, for shapeshifter = Ult Turret. Vi/Brawler = Ult grenade that bounces and stuns enemy units. Jinx/Gunslinger = Ult rockets that shoot and apply damage. If you don't have another Hextech unit, the ult is as random. If you have all four or whatever the amount? Not sure about that.
Void + Knight. Void Skin. Ult slams tentacles near location and heals for a portion of damage dealt.
Glacial + Blademaster. Frostblade Irelia. Throws out ult and units moving through it are slowed and may activate glacial stun.
Wild + Guardian. Ult gives a shield to ally unit, including self, that when destroyed does some damage to enemy units that destroy it.
Noble? + Sorcerer. Ult is the tornado that knocks up units up to X amount of blocks away.
Hextech + guardian. Hextech skin. Creates crater around X amount of squares. Those inside have their Armor and MR steadily decreased.
Imperial + Brawler. Jaximus skin. [ Shows an arena in it like Noxus has.] Ult could be stun.
Robot + Gunslinger. Project skin. Ult is the grenade that bounces off units. Or a 4th shot that crits when the mana bar is filled.
Void + ranger. Maybe similar to what was mentioned with Heimer? Other void units influence what her ult is. Brawler launches the missiles. Assassin triggers a dash towards a unit with a crit with additional damage. And Sorcerer could be the missiles.
Phantom + Blademaster. Applies rend stacks per auto on a unit. Once mana gauge is filled it applies the damage or it stacks up to X amount of times then triggers the damage.
Demon + Guardian. Dark star skin. Applies shields to units to left and right of unit.
Ninja + Shapeshifter + Assassin. Turns into blue kayne. Knocks up units X amount of squares in front of him.
Imperial + yordle. Charges through enemy units that apply "Haste" to friendly units near path. Ally units with Haste auto attack at a faster rate. Duration X seconds.
Robot + ranger. Battlecast skin. Ult increased auto attack speed or reduces armor and MR by units hit. Passive, when unit dies it creates a ghost that explodes on enemy units.
Imperial + Sorcerer. Creates illusions, duplicates, that act as a unit on the field. All clones must be destroyed before the real LB is targeted.
Ninja + Brawler. Acolyte Skin. Ult kicks a unit into other enemy units applying a brief stun.
Noble + Sorcerer. Ult is the laser that does damage in a straight line.
Pirate + Brawler. Ironside skin. Ult smashes into enemy units knocking them up.
Void + Elementalist. Like his E in the actual game it plagues a unit doing damage over time. A unit killed with this on it will have the curse bounce to another unit.
Phantom + Guardian. Haunted Maokai skin. Ult roots and stuns enemy units.
Glacial + Blademaster. Snowman Yi. Ult is alpha strike making unit untargetable. Could also be Robot + Blademaster. Project yi for the skin. Alpha strike still as his ult.
Robot + Sorcerer + Guardian. Ult is a heal that restores an ally's health by a portion.
Wild + Blademaster + Brawler. Dreadknight skin. Ult enlarges Nasus and increases Auto attack damage.
Pirate + Brawler. Ult is his hook that drags enemy unit towards his location and briefly stunning.
Glacial + Shapeshifter. Winter wonder skin. Ult transforms her into a friendly unit and has access to their ult when mana bar has accumulated.
Phantom + Assassin. Ult darkens the map and applies "Blind" to enemy units for X amount of seconds.
Robot + Brawler. Nunu bot skin. Ult is snowball that does more damage based on distance traveled.
Glacial + blademaster. While in ult he can not be damaged by spells/Ults.
I would keep going, but I'm gonna need to take a break. This took a lot longer than I thought it would. If anyone would like me to suggest the rest let me know.