Thanks for your reply.
I'm somewhat reluctant to raise the skill level of the other lances as I want to eventually use them to mlb the lance with skill level 14. Of course, it's also possible raise the skill level of the other lances to higher than 10, which will make them better than the sr assaults at max skill level.

I do have a lot of Anubis friends. I did read someone mentioning if the difference is higher than 13% I should chose the off element eidolon.