Anything melee, can IWT spam to stay on a target, once you're in IWT range.
That's further away than /follow range.

I was playing Paladin (Heals) leading 4x Death Knights.
With a Druid lead instead, I could have 'Travel Form w/Minor Glyph', IWT my Druid (spam this) to move the DKs.
With a Healer (any) and 2x DKs, a 3-person mount would have been an option too.

World PvP is not invalidated in any way.
Follow works fine there.
So, once you have the gearing... you can pick almost any zone... and because of the Cross Realm Zones, chances are there will be targets to kill.
The trick is keeping constant on Conquest gear for each season, without being able to run most teams in battlegrounds for those points.