Hi,
The first one could be '
His Childe' by Kallysten (Kally77 on AO3). It's the first story of a four parts series. The first three stories are on Nocturnal Light, the fourth
Whose Destiny? is on Cryptoffic.
The second one could be '
Only time will tell' by Grief Counseling (aka Dampersandspoons).
You can find it on Sunnydale after dark archive (link ubove) or
here on Nocturnal Light.
The third one makes me think of '
Teach me how' also by Grief Counseling. It's a remastered version though, so it could be slightly different from the version you remember. I'm pretty sure GC would accept to share the old version.