It's not Bosnar who should worry you with injuries, it's Milligan.Adam Griffiths works for me as he can play as a CB or DM and probably a WB as well.
Milligan would be good if he has his head screwed on. Bosnar would also be very good - especially if he has his injury concerns all sorted out.
Bosnar doesn't get injured by things, things get injured by Bosnar.
Oh, and no more Adam Griffiths. I've had to tolerate him in a red shirt enough in the last 12 months.