Sorry but siris1layers quite wrong here.
As a cleric-sub-bard you're basically just a fast cleric.
But a bard-sub-cleric is a powerful character that is underutilized in the game. Bard-sub-cleric can have the following buffs all going at the same time: Holy Word/spell, Bless, Recovery Division, Healing Cycle, Mana Cycge, Guard/Mana Tambour, Moving/Swing March, Noise, and with the right party members there's the possibility of Dance also.
I'd recommend taking a 4 lvl gap. Max out all your bard skills but only get Bless, Holy Word, Healing Cycle, and Recovery Division on the cleric side of things. Bard nukes are only slightly less powerful than wizard nukes and cast and cool-down much faster. Cleric attacks are less effective.
For more bard discussion look here:
http://www.silkroadforums.com/viewtopic.php?f=4&t=76831and here
http://www.silkroadforums.com/viewtopic.php?f=4&t=75385&p=956356&hilit=useless+bard+skills#p956356