I think there's a case for playing Heskey from the start regardless of Gabby's injury status. Just think we're struggling up front anyway so at least he unsettles defenders, can get some flicks/knock downs and help us retain the ball up the pitch and allow others to support.
Assuming Gabby makes it and Collins doesn't, I'd go:
Given
Hutton Cuellar Baker/Clark Lichaj/Warnock
N'Zogbia Herd Ireland Gabby
Heskey Weimann