Talk:Eidolon Gantulyst/@comment-88.200.215.96-20180210143418/@comment-106.71.104.219-20180210144514

All members of your team must sacrifice (a team effort).

It does not matter how many are in your squad, the same rule applies.

So to answer your question yes, you can summon it no matter how many are in your squad (even solo).