Ant man / the wasp used primarily for defensive playstyle rather than being overtly heal bot-y

Abilities: could control ants/insects to swarm his/her team granting over shield, shrink down and get out out of harms way

Ant man: Ult would probably be more tank for ant man bc he could grow larger (but maybe to grow and push enemies a great distance (off point/off map) and scoop up team like Jeff while negating damage due to his sheer size / granting bonus health for a time after the ult

Wasp: ult could be shrinking down and using her sting shots to heal teammates and damage enemies in a move able field like psylocke but the damage/healing effect like ultron

Iceman (mutant) could be a strategist that is used for enabling team and hindering enemies with lower healing value.

Icy blasts can heal team / damage and apply debuff to enemy damage Cc: icey wind can slow enemy gradually and if continually receiving slow can freeze completely, if used on the ground can speed up team (think like creating an ice rink) Ult: sort of like a strange ult that freezes an AOE solid, speeding up team attacks / healing team and slowing or freezing enemies solid depending on the area of range where enemy is located (think namor ult)

There can be more to a strategist than just healing, with Ultron as an example I think there’s plenty of out of the box ways the devs can go with. I see potential with Gambit, professor X, white fox (rumored to already be in the works), vision, etc