it would appear that the game treats counters as assists.
Neither assists nor counters can call assists despite them being "attacks".
Maybe that is just a special ruling for balancing purposes. Would be nice though if it was properly reflected in the wording.
As for the multiattackers: I would guess that the ability as a whole is treated as an attack.
Fotps double tap is one ability, even though he attacks twice. So it is the activation of the attack-ability that calls assists, not the multiple instances of damage it does.
Fost zeta is different from anyone elses since with its pure "ability" wording it avoids the "attack ability counter/assist" ban.
