It has been such a long time...
Can I still kill? Yes. Do I want to kill, especially since this time it is likely to be up and personal, not any sort of remote bombing or auto-targeting? No, and I shall bleed for them.
Can I not kill, if this is the call? No, for I must. I can only promise them there would be neither viciousness nor savagery, for nothing shall perturb the chill of our deeds we are to commit here.
It has been such a long time...
Commander, I support Lyra's notion. As you correctly pointed out, their motor park is on the opposite side of the base; if anything, it would be quite easy for them to consolidate forces there, out of our immediate reach. Thus, if they do have anything of considerable power in that motor park, it would serve us good if we can stage a diversion right there, before they have that chance to move out and counterattack. Perhaps a small detachment, one or two people, could get over that part of the enemy's base more or less covertly - while everyone in the base is distracted by our main forces, just according to your plan - and prepare to make a crippling strike the moment they try pushing back.
Now, I would volunteer myself, if for nothing else then courtesy, but I have no flight capability. Gilgamesh, while mighty without doubt, is not exactly suited for this kind of subtlety, so we would rather send someone in a Mk III. Thus, I suggest either Mesk, or perhaps Lyra, could perform this maneuver; possibly Bartholomew if he was lent a MFM. Naturally, Mesk bears the least risk, but his pyramid artifact might prove insufficient, unlike a field manipulator or an amp.