dont have the exact list with me but the bulk of it is in my head.
herald of tz chariot, bolt, legion, master
3x5 horrors with bolt
2x5 fiends with might
I don't think
skarbrand or skulltaker are worth the points. Better of with a regular BT, fate weaver or more TzHeralds. the extra points into a another unit of BL would help too.
Agree with deviant. Skarbrand is only for slaanesh lists or maybe for nurgle. Skulltaker isnīt worth it since just about everyone have inv saves. I would have 2x 5 Horrors and 2x 10 bletters or 10 bletters and 10 daemonettes. Donīt take seekers if you have slots for more fiends, fiends are much better than seekers.
Second about fiends over seekers.