Hi,
my Cave Shaman is now 38 and 2lx and I need some tipps for my RAs.
I thought Purge1 and MoC1 will be a good start. MAybe i respec with 40 till 49 to Groupspec and later on back to Cave (41/34/7). WHich RAs shoud i spec first? With Level40 IChor1 too ?

greetz

Why MOC1? Only 25% damage.
Go for some mana RA's.

At least Wild Power I - before your DoTs can't even crit.

Going group spec is not a bad idea. You will get groups at 50 which will help you gain RR faster. Cave shaman is more of a small man/solo spec, in my opinion. It's entirely up to you.

For Cave RAs, I would recommend:

LW1 (With yellow end you should be able to sprint forever, at least on live. Someone else maybe able to confirm/deny this)
Serenity 2-3
Wild Power 2 (at least one for crits, as Razzer said)
Ichor 1
Purge 1 (maybe even 2)

This is just the start. I would think that since you'll be doing a lot of dotting/bolting and then kiting, Serenity will do you more good than MCL/RP in the earlier RRs. Haven't played a Cave shammy though.

Runental would be the best person to speak to about this.