I would definetly go for Slop Haulers. They are so versatile: you can heal up your summoned pigs, or Ulix, the "Appetizing" condition is great to make up for your piglets low Ml4 and once in a while you can use them to run a scheme.
As for Masters I'd recommend Wong. He is a great independent Master who can dish out loads of damage and his box comes with lightning bugs. I consider the bugs to be one of our best minions at the moment. Cheap, reckless, ignore armor and great utility tricks through "Tinkering with the unknown".
Somer is also a great Master for any gremlin collection imo. He can be so stupidly quick around the board and his shooting attack is just nuts. Also: He summons bayou gremlins.
I'm not sure if I'd recommend Mah Tucket. I feel like the gremlin-community is pretty much divided when it comes to her. Although her box comes with Trixibelle, who is a great addition to any collection.
Also: you need another big pig for you ulix-lists. Summoning piglets from Old Major is kinda risky. Try the sow and shoot her in the back with your bow for pinball madness.
Oh and I would like to mention Merris LaCroix: she drops schemes for summoning your war pigs with ulix. And she drops schemes in general. And she is a chubby flying goddess in a tube top.
