They don't seem to be unique-

How about 3 mercenary copilots in a Decimator?

Keep at range 3 and turn every hit into a crit.

Diminishing returns, shields + that range restriction (and the fact that there are better crew combinations for the VT-49 makes me not want to fly with three Mercs.

One? sure - sometimes.

Pew! Pew!

Take that, Dash!

It's not worth it unless you're confident those 3 crits will stick. If you know for sure you're facing a squad with mostly or all Agility 1 ships, then it might be fun to try.

Two might be fun, though. Use Moff Whatshisname, too, and sacrifice the mercs.

Three is not as effective as 2 and a Navigator, or possibly a Merc Copilot, a Tactician, and a Navi...

2 maybe with a tactician for a range 2 bonus and you already have the range 1.

But to be honest I would want an upgrade for each range band. So Merc Copilot Tactician and Mara Jade which will leave only 2 out of arc as lacking a bonus.