So back in February, I was in charge of a Legion side of a campaign that my local group had started to run. We weren't able to continue due to... extenuating circumstances, and TTS wasn't an option for the majority of us either. We had planned on picking it back up or starting over once the pandemic died down, but unfortunately, too many people have left (myself included) for that to be possible. Rather then just dump everything though, I thought I'd share some of the ideas here. In particular, I haven't seen many alternate game or list formats talked about besides standard and skirmish. So here's some of the list building formats that the campaign used. Of course, these work best when both players are using the same format, but otherwise these can be used for both standard point and skirmish games. One final note; this campaign was made with rebels vs imperials in mind, as clones and droids weren't yet released enough to play at the time.
Standard Issue X
1-2 Commanders 0-2 Operatives
3-6 Corps 0-3 Special Forces
0-3 Support 0-2 Heavies
This one follows the standard format with one important exception: your army cannot contain more than a combined total of X (do agree on this with your opponent before hand, somewhere between 0 and 2) upgrades from the heavy weapon, armament, and hard point categories. They weren't available at the time, but ordinance upgrades would also be counted against your total. A few games with these lists do give you a new appreciation for your units basic abilities (or lack there of).
One of a Kind
1-2 Commanders 0-2 Operatives
2+ Corps 0-3 Special Forces
0-3 Support 0-2 Heavies
I found this one to be more fun than it sounds. For these lists, each unit and upgrade card is treated as being unique. Bright side: no more X unit spam. Downside: same applies to you. Campaign-wise, this was used when one side was attacking somewhere that was left undefended on the map but really shouldn't be; for example a base or headquarters, and represented that side pulling whatever it could together for a last ditch defense.
Nameless Battlefield
1-2 Commanders 0-2 Operatives
3-6 Corps 0-3 Special Forces
0-3 Support 0-2 Heavies
Adding this one here for sake of completeness. Its rule is pretty simple and the exact opposite of the last format: no unique or named characters/upgrades allowed. It was a default rule for most lists during the campaign though, since characters were on the map, and could only take part in battles at the same location. Before anyone asks, the operative limits were there because the campaign had non unique operatives for the rebel and imperial factions.
Well those were the most common list building rules we used. There were others that were scenario specific, but if someone is looking to try something just a little different or for some inspirations for their own campaign, I hope this helps.