Since the E84 is so similar to the E90, I found this thread to be useful:
https://www.e90post.com/forums/showthread.php?t=849088
So I've always aimed for:
Center bolt - 100 NM (74 Ft-Lb) + 100º
Tower bolts - 40 Nm (30 Ft-Lb) + 60º
BUT, if I'm reusing the bolts, I pretty much skip the additional angle for fear of breaking them.