- Use /bghealer to modify the size of the icon above nameplates.
- Make sure to enable nameplates above enemy players
- Set the nameplate distance to as far as it can go (this is a limitation in classic)
- Any time a healer is close enough for their nameplate to appear, they will be marked
- The WoW api doesn't directly return the spec of players on the enemy team like it does in retail. This version is watching the combat log for players using spells that are unique to healers.