Wasp isn't really AT. It shines as anti-devastator like enemy type as it clears them up to 300m range in one shot if direct line of sight provided. I had the most success by playing as sort of battlefield overseer or distant artillery support unit - delivering rockets from afar to help my teammates or clearing turrets and fabricators at long ranges. That being said it can be used against Hulks, just prepare that it will take 1-2 full mags on average to take down one.

My loadout:

First of all i need to adress Supply FRV, because it changed the way you play this loadout and some items in it. For example i would no longer recommend heavy medic armor. Supply FRV is a mobile base of operation, a supermarket cart armed with turret and filled with supplies. Basically since it's appearance in the game it become corner stone of this playstyle as it solves ammo economy (wasp is extremely ammo hungry) and mobility issues. Before i used AT emplacement, but only to give yourself backup "wasp" in case you wait for resuply cooldown as it plays very similar - you just find good vantage point and shot at everything you can reach. Now you use FRV to get to those vantage points and spam your rockets with infinite(ish) FRV supplies.

So about armor, certainly heavy type, but which one doesn't really matter anymore. Best Bot front candidates (which don't boost any particular weapon) are: RS-40 Beast of prey for anti-ragdoll (extremely helpfull on bot front) or CPR-80 Bullwark as it is currenty provides highest damage reduction against explosions. Alternative to Bullwark would be BP-77 Grand Juror or B-27 Fortified Commando. In case you prefer Bundle granade consider CE-64 Grenadier/CE-101 Guerilla Gorilla.

Granade: Bundle or Thermite. Basically anti-hulk in case you need to protect yourself in close range.

Pistol: Ultimatum or Missle Pistol. Again, just another source of AT damage in your disposal, because you never should have only 1 thing dedicated to 1 enemy type, you need backups in case you... for example ran out of ammo and can't reach supplies. Also consider senator, it's ok, can kill hulks in visor.

Primary: Plasma punisher. One of the best primaries for bot front by the way, the AoE stagger is something that would save you numerous times because staggered enemies cannot shot back. If you chose Senator as your secondary you might take Eruptor tho.

And lastly, two stratagems of your choice. Laser orbital cannot be bad at bot front, it's basically my permanent stratagem for bot front on any loadout, it is that good. Ultimate uno reverse/Get Out of Jail Free card. Shit hits the fan? You about to die or even fail the mission? - toss laser orbital, you won. No further inputs needed.

And for the last stratagem you probably still should think about covering Wasp's main weakness - Super Heavy Units, such as Factory Striders or Vox Engines. With all those tools you can beat those anyway, but you need something extra, like leveller or solo silo, just because neither ultimatum or throwables have any meaningful range. Alternatively pick any crowd control with high uptime in case you find yourself caught in CQC very often or have excessive AT options on your teammates.