What tactics and combos work well?

Well, "swarm" is going to top out at 5 fighters (unless you want to fly 6 HWKs without turrets, which I wouldn't recommend!).

To be honest, with a swarm you're going to be concentrating on basic squadron pilots, and Y or A wings for the majority of your force. That means you're probably not going to have many named pilots and it mostly comes down to the art of manouvring generic grunts; three of the cheaper fighters (Prototypes Pilot, Gold Squadron Pilot) and two of the more expensive (Rookie Pilot, Blue Squadron Pilot), with a tiny pittance of upgrades and/or one named pilot.

I'd suggest generic Y-wings as basic ships; prototype pilot A-wings are good, but they lose some of the benefit of that boost action when they're a lower pilot skill than their opponent.

I think the rebel swarm needs 3 attack 3 ships and 2 Y's or A's. The tactic is using your attack power 2 ship as movement blockers/hit soakers. In this way your heavy firepower ships gain the advantage on movement and actions.

YYXXB

AABBB

These are the popular squads I think, with the upper list making it to the worlds top 8.

BBBAA - thats some serious firepower with some annoying blockers/flankers.

I prefer AABBX. I usually stack my As on one flank with my Bs stacked in the middle where I can use their mobility in an asteroid field. I put my Xwing adjacent (one movement stick) even with the back bwing opposite Awings. Since it is so much faster it can "Pounce" as needed and being back a little usually means the Bwings, with more HP, get shot at first.

I've contemplated one Y instead of an A, but I don't fly rebel {scum} often so I usually stick with this or Blue Garnet variations.

I would suggest going with 8 Z-95s

I would suggest going with 8 Z-95s

I'd go with 6, with 4 Assault Missiles and two Concussion Missiles, to defuse Proton Bombs before they kill your ships.

I actually like the idea of flying Roark+Ion, 2 X-wings, and then once they are out 3 Zs. You can Always replace Roark with another X if you like tthough as well. I am interested in seeing if this aould work.

One of the first things I fiddled with was Roark + z's.

Here you have your swarm: ZZZZZZZZ

that swarm will make me so sleepy tho, all of those ZZZZZZZZZZZZZZ

How about

BBZZZZ with a couple of Missiles, adding a couple of B-wings will help add more firepower

I 'd agree the Z is gonna be better in Mini Swarms backing up Bs Xs Es or even a Falcon.

Chewbacca with a swarm of z's could be fun

yep i cant see 8 z's being that competitive

When the Z-95 comes out it will be the standard for rebel "swarms" just like the TIE Fighter. Unless I'm missing some universal support from the Rebels I don't think you'll see Zs in the same numbers that you see T/F but the "mini swarm" can be interesting.

I think the BuZZ type squads will do better than the Sleepy swarms but maybe one of the other Z-95s is the Rebel Howlrunner.

How about AAXXZZ? It would be an even 100 points.

BBXZZZ?