Back when getting that Gilded Magitek was a thing, it was common DF policy to swap Comms; Tank><Healer, Dps><Dps. I haven't done a lot of DF till recently with the new relic out, but I have noticed that house rule has fallen wayside.

Sidenote: Giving 5 comms weekly grants xp through the challenge log, so sorta an achievement.