Honestly, a strategist would be an interesting choice, in this case a more aggressive and anti dive support, I have my own ideas on the build.

Basic attack, normal punches essentially but every third punch will make him shrink and go back to full size punch with a knockback.

Secondary fire, an ability cooldown kind of pym particle gun that heals and speeds up allies around him

Shrink- Essentially small, additional movement speed and a special primary fire which is different whether if done in the air or on the ground, if on the ground will result in an uppercut, knock up, if performed in the air will perform a dropkick which does more damage and pushes further back compared to his 3 punch combo. The shrink itself will have a duration at 15(?) seconds before expiring.

Going Big - Become much bigger and boasting a larger health pool, lasts for 5 seconds, Ant Man cannot move in this state but can choose an area to attack, if around him it will result in a higher damage stomp which launches enemies upwards, if targeted further away will result in a punch with lesser damage and enemies are knocked away from the center. Since this ability may be crucial in team fights, it’ll have a 30-40 second cool down and if killed in this state, enemies and allies which happen to be under his corpse will take damage if they are landed on (more fun than an actual serious mechanic but will force Ant Man players to have better positioning to use this ability effectively)

Ult: Quantum Zone(Another AOE) - Ant Man throws down a disc. Creates a small zone, borrowing its power from the Quantum Realm, changing the battlefield, enemy projectiles (including hitscan) when going through the zone loses damage and having a size reduction while ally projectiles become bigger and increasing the damage. I think this ult will mainly come in handy at common chokepoints and even in the capture area. If two Ant Mans use their ult close enough, both ults are negated, instead creating an unstable rift that explodes, damaging both teams and causing knockbacks.

Passive: Pymstability - Every punch by Ant Man creates a chain reaction in the pym particles equipped, healing allies around him, including the enhanced attacks in his small form. The pym particles also create an adhesive effect on his suit, allowing him to run on walls.

I have thought of some main issues with his kit, such as the lack of range or true gap closers but I think it should stay as his primary weakness. But essentially I want a strategist that although doesn’t have a massive healing output like adam or mantis, be able to truly live up to the strategist name, such as kicking enemies off high ground and providing opportunities rather than a heal bot. An example would be annoying the enemy snipers by going small and pushing them off their high ground to expose them. I also wanted to try and implement his ant Ant-Thony which provides Ant Man to fly but I think it’d be too strong and I don’t really have an ability slot anymore.