To find out how much lag will equiping two elves takes, I did two WIP, in Missile Factory and Gigantic Elevator. In Gigantic Elevator, I saved about 7 seconds from my previous movie, by using super-quick charge.
Missile Factory:
http://dehacked.2y.net/microstorage.php/info/626070847/missile%20v10.vbm
Gigantic Elevator:
http://dehacked.2y.net/microstorage.php/info/1989149579/lift%20v6.vbm
(The movies should be played on VBA 23.0 to 23.6)
This two stage has much lag. After finishiing the two WIP, I don't think equiping two elves is well distinct from equiping one on lag. I'll prove that.
Also, with red-crowned-crane and computerbird settled down, they joined the movie-making, so the movie will be finished sooner.
EDIT:I did some calculation. If the bird elf is not equiped till the last stage, I will spend 43 more frames on menu. It cues that only if the lag redused by equiping only one elf is more than 43, I can save the time. However, it is totally impossible to reduse 43 frames of lag, because all the lag increased in my above test is below 43.