Biomech also has very strong medpacs and great stims. Sure as a Commando/Vanguard and Dorne, the chances of HP getting too low are rare, but still possible. The surgeon units are great to heal yourself and Dorne if a nasty aoe hits you both, since she'll otherwise spend her time healing herself.
As someone with a Shield Tech, I regret going Armormech, especially whevener I RE a Blue and see 'You already know this schematic'.
Biochem saves you money because if you RE a big enough stack, you'll automatically get the next schematic, and that saves you money from mission skills. I honestly think each crafting skill should be able to craft the mods that go with the orange pieces and eventually be able to craft the best gear in the game for that, but the schematics would only drop in NM Ops off bosses.
Cybertech should just get all kinds of awesome goodies in compensation, and I've gone off-topic again, figures.
If you have the patience for it, Armormech can be useful if you can't always get a group for dailies and FPs, but overall Biochem is friendlier, sad fact.