Which Bigg's Build do you think would keep him alive longer?

Astromech: R5-D8

Mod: Hull Upgrade

or

Astromech: R2-F2

Mod: Stealth Device

How you play each configuration will likely have a larger effect on how long Biggs stays alive than the configuration itself. I would say try them both and see which agrees with your play style.

The best Biggs is no upgrades.

Until integrated astromech. Then add r4-d6

The best Biggs is no upgrades.

Until integrated astromech. Then add r4-d6

Or R2-D2! This is going to be tough to crack:

Kanan Jarrus (38)

+ Ghost (0)

+ Ion Cannon Turret (5)

+ Recon Specialist (3)

+ Fire-Control System (2)

+ "Chopper" (0)

Biggs Darklighter (25)

+ R2-D2 (4)

+ Integrated Astromech (0)

"Zeb" Orrelios (18)

+ Phantom (0)

+ Dorsal Turret (3)

+ Han Solo (2)

Kanan will always be able to reduce 2 incoming attacks on Biggs even after red moves thanks to Chopper. Chopper's damage doesn't matter as much when Biggs is taking the shots. R2/Integrated keep Biggs alive longer. "Zeb" is just a cheap Phantom build to dock and maybe even deploy if they can get trough Biggs and Kanan first.

Biggs likes to party naked. Spend the points elsewhere.

Garven

Biggs

Blue+FCS

Blue+E2+Jan

Every round Biggs will have a focus and an evade. Keeps him in the fight MUCH longer! When flown right, he often doesn't even die! Fun and simple Rebel list.

R4-D6 is the only upgrade Biggs can take that increases his survival by enough to be worth the points.

Integrated Astromech will soon join it.

Interestingly, R4-D6 is no longer worth it if you're planning on flying Biggs next to Kanan Jarrus (Pilot), but the regenerative ones may join the fray in that case...

With IA, I've been enjoying R2-D6 + Crack Shot

Integrated Astro and any 1 point droid (probably R4-D6 is best, but it doesn't matter much, just there to be thrown out, anything else is a bonus)

When flown right, he often doesn't even die!

PHeaver-level required.

IF he's always at R3 of most foes and behind asteroids, and your formation constantly shifts, providing the enemy with possibility to target other ships especially with regen and evade tokens...

then it's true.

We're no PHeavers, sadly.