Now when using Heavy Laser Cannon and I have a Merc CoPilot after I change all of my criticals to hits, can I change one back to critical with the Mercenary Pilot? I think so.

Now when using Heavy Laser Cannon and I have a Merc CoPilot after I change all of my criticals to hits, can I change one back to critical with the Mercenary Pilot? I think so.

You are correct, you can change one back.

Correct. In fact, the HLC changes the dice immediately after the initial roll, and any other modifications which occur after that - Mercenary Copilot, Marksmanship, even a reroll via Krassis, Jonus, or a target lock - will stand, even if they're criticals.

Try taking:
Omicron Group Pilot + HLC + Mercenary Co-pilot + Mercenary Co-pilot + Engine Upgrade (36)

Two crits at range 3 with 4 attack dice? Yes please.

Try taking:

Omicron Group Pilot + HLC + Mercenary Co-pilot + Mercenary Co-pilot + Engine Upgrade (36)

Two crits at range 3 with 4 attack dice? Yes please.

I've been looking at flying 2 of these and flying Jonus with them. Wasn't sure if that would be overkill on dice manipulation or not.

Try taking:

Omicron Group Pilot + HLC + Mercenary Co-pilot + Mercenary Co-pilot + Engine Upgrade (36)

Two crits at range 3 with 4 attack dice? Yes please.

I've been looking at flying 2 of these and flying Jonus with them. Wasn't sure if that would be overkill on dice manipulation or not.

Not. Though your enemy might not feel the same way.

There is no such thing as overkill.

Only "open fire" and "reload"