This post may possibly be controversial considering the design sensibilities of some of the posters on this forum, but I'm posting this anyway.
A lot of "basic" assemblies that require unique modpacks should be advanced or master assemblies using regular mods instead--they're largely a waste of unique modpacks compared to whatever else the player could make instead. Originals in [].
[power armor (red armor + PN)]
Since it's a "faster" doubled protection red armor, shouldn't it make sense that it would be constructed with either two P mods (8 protection variant) or two A mods (no speed penalty)? A T mod would be the auto-repair circuitry.
Suggested:
turbomotor power armor (red armor + AATP) (I know this is the same construction as Cerberus Armor, but honestly, that assembly is trash, should be scrapped, and there's better ways to add element protection.)
(same as old power armor but with 4 protection, still repairs 1% on each action and indestructible/cannot be unequipped)
hardened power armor (red armor + ATPP)
(same as old power armor but with -20% movement speed penalty, still repairs 1% on each action and indestructible/cannot be unequipped)
[plate armor (red armor + PO)]
This makes only a slightly improved Gothic Armor with the same movement penalties--something that wouldn't happen if one were to choose to NOT make such an assembly with the Onyx pack. Instead, it should be constructed as a really, really heavy red armor.
Suggested: plate armor (red armor + PBB)
Same stats as old plate armor. If any of you think it's too powerful (rolling eyes) then make it 200% durability and indestructible or something.
[plasmatic shrapnel (any shotgun + PN)]
This isn't affected by Army of the Dead, not to mention it's possible to lose the nano bonus by choosing to put the P on first.
Suggested: plasmatic shrapnel (any shotgun + TTT)
Same as old plasmatic shrapnel, but without the ammo regeneration. Call it a marvel of technical wizardry turning buckshot into plasma.
[lava boots (any boots + TO)]
Neat, but not worth wasting an onyx pack over considering it has durability to lose.
Suggested: lava boots (any boots + TPP)
Same stats as old lava boots.