You heard me. You've been in a party that has had 2 melee in it before. Let's forget DRG for a second and say it's 2 monks.
The immediate problem with Monks is that Dragon Kick does not stack, so you effectively lose dps by having more than one monk in the party. To rectify this, having the second monk go Pugilist instead and bring [Raging Strikes] and [Blood for Blood] will see a huge damage boost. Dragon Kick should still be proccing from the other monk, but now you have a PGL that has a 50% damage boost during a 20 second timeperiod. Fifty. percent.
By going PGL you lose Shoulder Tackle and Howling Fist, but you can also support the party more. Along with casting Mantra to assist healers you could cast Virus if a summoner/blackmage is not present in the party.
To replace the loss of shoulder tackle simply cast [Venomous Strike] for a ranged attack on the way to your new target, don't worry about the stun as the second monk's Shoulder Tackle should have that covered. There is not much that can replace howling fist as an off GCD ability though from what I can tell, however, I feel that a 20% damage boost for 20 seconds that has the same recharge as perfect balance is more useful than howling fist which has a very long recharge to begin with.
Come on, look at your class, and see how you could mix it up with cross class.
http://xivdb.com/?skilltree/Pugilist <-- replace the Pugilist with the name of your class (not job)
I also would like to look into breaking the pentameld system a bit and play with different builds, but the problem with doing that is that a full set of endgame crafted gear costs MILLIONS OF GIL. So if I wanted to see how a PGL healer could fare, I would need to be richer than Tom Hanks to try it out! What a shame.
How about you, have you thought of any good uses for classes (not jobs) and other ways to play with the game's builds a bit.