I did try HUDMap just out of curiosity, and it doesn't appear to be working properly (using the october 22nd alpha from
WoWAce).
Either it shows totems to have a radius of about 1 yard (you're basically only in range of all if you stand somewhere between the four), or it constantly shows you as being in range even if you're on the other side of the instance.
Is it in a non-working condition, or did I miss a setting somewhere?
Edit: Seems now, lots of testing (1 yard radius) and an instance (unlimited range) later, totems are finally displaying a reasonable radius... only, it's wrong. Looks like the addon only displays ~35 of the 40 yards of radius for the totems. I guess if you can get it to the point of working that I'm at now, it could work until it's updated properly. But I don't know yet if it'll still work after I exit and restart the game.