My locks are all currently SL/shadowburn spec and I just dot dot wand things down when I'm not aoeing. Since I'm 60 I think I'll just respec DS/Ruin(for raiding) once my bear is in the group.

In your case deeper affliction build would be better imo. I think finding a combo of corruption, siphon life, curse of agony, and possibly Drain life along with wanding would be best. This would do two things for you. One, you would have a nice steady dps curve and not be as spikey(unless you use NF procs) potentially pulling aggro off the tank. Two, it would give your locks a bit of self healing so you don't have to micro manage the heals as much. The only downside would be a little more downtime drinking and even then you could go dark pact soon.