There is no such thing as “healer only” corruption effects.
All corruption is and isn’t useful for a variety of reasons and situations, so you will want to consider all of those.
The best you’d get are stat procs, or leech.
Remember, if you do enough dps to make a combat instance go 5 percent faster, that’s 5 percent less healing you need to do.
Honestly, they are probably the best ones you COULD get, because they do a lot of damage naturally without much effort on your end.