Tank does tend to get them most often by default as long as they hold aggro, followed by the healer (since when playing Tank I do often have a bias toward the healer).

Then again, I just did a WP run where I got 2 as MNK and know I gave mine to the other MNK (2 monk WP. Bosses were so fast). 3/4 to DPS is not bad at all. I also gave mine to a summoner once who was synced down in Tam-tara because the healer just stopped healing me, I died, and the summoner used physic/topaz to keep the other DPS alive and finish off the boss. Impressive stuff.