List 1: THUGZ IN $PACE

Bossk - YV-666 (35 + 15)

Veteran Instincts (1)

"Mangler" Cannon (4)

Engine Upgrade (4)

Hound's Tooth (6)

Syndicate Thug - Y-Wing (18 + 7)

Twin Laser Turret (6)

BTL-A4 Y-Wing (0)

Unhinged Astromech (1)

Syndicate Thug - Y-Wing (18 + 7)

Twin Laser Turret (6)

BTL-A4 Y-Wing (0)

Unhinged Astromech (1)

I feel like Bossk needs better upgrades. Engine Upgrade seems good to me, but I feel like something could replace it, same with Veteran Instincts.

Marksmanship is an obvious choice, but I feel like that is a trap. Mercenary Copilot seems good as well, as the YV has no problems staying at Range 3 at least for the beginning of the game.

Bossk - YV-666 (35 + 15)

Marksmanship (3)

"Mangler" Cannon (4)

Mercenary Copilot (2)

Hound's Tooth (6)

I guess my question is, which Bossk do you like better? Can you suggest a different Bossk build?

I think that trying to build around Bossk ability is a trap. I prefer to take it as a bonus, like Brath ability.

First off, is it for a tournament or casual play?

If for a tournament, I would drop the title and use the point elsewhere. Engine Upgrade is great on the YV to either come back faster when you need to turn around, or boost away when under too many fire (straight 4+boost can go a long way). Veteran Instinct is nice if you think you'll go against many Aces. As for the crew, I think that's where the YV really shine, you need to use those space. I would personally go with a Gunner (because a second chance is always nice versus high agility ship), Tactician (to have some control on the board) and K4 droid, so you can still have an action even when blocked.

So for Bossk, I would go with something like this:

Bossk

Veteran Instinct (or Calculation if you really want to have a way to trigger his ability)

Gunner

Tactician

K4 Security Droid

Engine Upgrade

50 pts.

Also, I would drop the title on both Y-Wing, I think you'll get more mileage without it. Your experience may vary, of course.