[Champion Concept] Lily and Aquan

So I had an idea for a champion concept for a support-style champion with a secondary part which you'd have to control via alt+click. It wouldn't be easy to play, because you have to control two separate parts, but could open lots of new strategies in bot lane... Here is the basis of the champion, with little to no numbers.

Lily and Aquan are allied characters who use earth and water, respectfully, to aid allies or impair opponents. They use health for casting spells, and are both controlled by a single player.

Passive: Aquan, the Water Elemental. You can control his movement with Alt+Click, how clones and Tibbers are controlled. Aquan does not have a basic attack. Whenever Lily cast a spell, he emits a small, low damage, AoE around himself. Aquan has his own health bar, based on a base amount plus a percent of Lily's mana from items built. He regenerates health based on how fast you would recover mana, however can not gain life back if he was hit recently. If Aquan dies, he has his own respawn timer equal to what Lily's would be had she died instead. Afterwords, he spawns where Lily is. Aquan has 120%* of Armour and magic resistance from items, where Lily recieves 20%* less.

If Lily were to die while Aquan is alive, Aquan teleports to Lily, shielding her and replacing her basic abilities with his abilities. He remains until he dies or Lily reaches a percentage of her maximum health by her natural regeneration rate. During this time, Lily is untargetable and moves with Aquan. This can only occur once every 240* seconds.

*These numbers are for example.

Q: Earth Armor // Water Jet Earth Armor - Lily grants a nearby allied champion, not herself, a temporary shield. While this shield persists, that ally also has increased armor. Water Jet - Aquan fires a bolt of water, which leaves a trail until it hits an enemy champion. It slows the first enemy champion struck, and increases the speed of allies on the water trail.

W: Stone Wall // Water Wall This ability summons a wall of impassible terrain, which can be attacked by either team to destroy it quicker. The Wall takes more damage from AoE skills. Earth Wall, cast by Lily, takes reduced physical damage and prevents projectiles which deal physical damage from passing it. Water Wall, cast by Aquan, takes reduced magical damage and prevents projectiles which deal magical damage from passing it. If a projectile does not deal physical or magical damage it is completely unaffected by this skill. Both walls share the same cooldown.

E: Stone Trap // Aqua Dash Earth Trap - Lily sets a trap that takes a moment to arm before becoming invisible. When triggered, the trap impairs the target based on what level the trap is. Level 1: The target is slowed. Level 2: The target is rooted. Level 3: The target is rooted and has their attack speed slowed. Level 4: The target is roots and can not use basic attacks. Level 5: The target is stunned. (I was thinking a short duration like 1-1.5 seconds.) Aqua Dash - Aqua dashes in a direction. If it is a short dash, it can pass walls. If it is a longer dash, it can not pass walls. Short would be less than half the dash distance, while long would be more than half.)

R: Aquan's Sacrifice While you are Aquan you may use this ability to heal all nearby champions. The heal is reduced by half for enemy champions, and this ability heals Lily despite her being otherwise untargetable. This kills Aquan, and the heal is based on his current health + AP ratio. Aquan's death timer does not start until this ability is off cooldown.

The idea with this is that Lily is the master of earth, and is friends with a water elemental who protects her. She would be a relatively low damage support, with her poke all coming from Aquan. This would require good positioning of yourself, and Aquan as to not get him killed but to get him close enough to deal his AoE damage.
In lane, you would try to keep your opponents at bay by dropping traps to impede them should they try to engage, and keeping your ADC shielded for all skirmishes. Using Earth Wall as a disengage or to slow down a gank, while still using Aquan to poke at enemies with his AoE. While this does give a zoning tool, Aquan does have his own life bar and can be targeted separately, so you have to care about his well being too. On top of these, you spend health for your abilities, so you can't just spam skills, or you would die, so you have to pick your battles more carefully than others. Despite spending health for skill, you still have to build mana otherwise Aquan becomes obsolete, his health he gives you when you die would be too low to help and he would easily be taken out in one or two hits in team fights. Also, you are rather weak to AoE attacks due to having to protect both yourself and Aquan.
When teamfights break out, you have some minor AoE damage with Aquan, and ways to keeps your backline safe from attacks, including a wall to prevent flanking. And, should you die, you gain a chase tool with Aquan's Water Jet, and an escape tool with his Aqua Dash. While, if things are looking grim, you can self destruct with your ultimate, allowing your team to continue fighting or a chance to escape.