lightning and fire: CL plus what?

[jrmunch]

Hello, I would like to try a dual tree lightning/fire sorceress uses chain lightning from the lightning tree. Could I get opinions on the following 3 options? Do you see any other alternatives?

Thanks!

option 1:
CL 20
LN 20
LM 1

MT 20
FB 20
FM 1

option 2:
CL 20
LN 20
CB 20
LM 1

FW 20
FM 1


option 3:
CL 20
LN 20
CB 20
LM 1

HY 20
FM 1

[jrmunch]

pardon me, I forgot to mention this is PvM. Thanks.