Kanan / Biggs has been around, and this takes the idea to the extreme.

https://geordanr.github.io/xwing/?f=Rebel Alliance&d=v4!s!4:-1,4:-1:1:;156:36,120,-1,-1,198,201:-1:14:;222:205:46:-1:U.75,U.-1&sn=Seriously Bigg%3F

TIE Fighter: •Ahsoka Tano (22)
•Sabine's Masterpiece (1)
Snap shot (2)
•Jan Ors (2)

VCX-100: •Kanan Jarrus (47)
Tactical Jammers (1)
Fire-Control System (2)
Autoblaster Turret (2)
•Jyn Erso (2)
•Rey (2)

X-Wing: •Biggs Darklighter (31)
Stealth Device (3)
•R2-F2 (3)

Total: 100/100

Biggs hides behind Kanan and uses R2-F2. With stealth device his agility goes to 3, R2-F2 makes it 4. If Kanan is covering him with Tactical Jammer, Biggs will roll 5 dice, 6 at range 3. Kanan uses Jyn to give Biggs focus, hopefully 2 or 3. Ahsoka carries Jan to make one of those an evade. Kanan has a stored focus on Rey, and Ahsoka can feed Kanan another action for focus. Kanan can now reduce two attacks on Biggs by 1 die, who is rolling a ton of dice with focus and evade. If the team can maneuver in such a way as to keep their actions and cover Biggs, he'll be very difficult to take down.

Without much damage output, this list will struggle, but hopefully Kanan's autoblaster or primary and Ahsoka and her snap shot can plink away.

Would this work? Even if it did, would it be any fun?

I don't know, doesn't putting Rex in there to double down on attack dice reduction look like more fun?

You do have FCS Kanan, so damage isn't much of an issue. Not having access to the Ghost title weakens you a bit, but in arc that is no issue.

Edit: Oh and think about Operations Specialist on the TIE for more focus generation, maybe.

Those are good ideas, Admiral Deathrain. However, giving up Ahsoka means she can't feed an action, and giving up Jan means no evade for Biggs. I do like Rex in the combo, but I'm not sure giving up Ahsoka is worth it.

Yeah, I tried putting a list I liked into a squadbuilder and either came up with too few points or too thin ships (it is possible to run Rex and a Phantom, but you'd have to cut either FCS or run no crew on Kanan at all - meh). Rex is probably too awkward.

I think having the shuttle docked with Kanan Biggs is a key to the list. That end of round TLT is crucial to it's success IMO.