Cleric casting Spells while using Shield and Weapon

[Shin Okada]

If your hand isn't free, how could you possibly fire a bow (which the rules specifically allow)?

"Free hand" is a game term. The fact that you can do something with that hand does not prove it to be "free" for spell casting purpose.

 

[cidak]

If you decide against the small shield all you'll end up achieving is pushing the cleric (and paladin) into using two handed weapons.

Given the improvements in power attack and animated shields, the cleric will have the last laugh.

Especially when combined with Righteous Might. +8 str, +4 con, +4 natural Amour, DR and up one size category to boot. And if that is not enough, later on you can cast quickend Divine Power.

Why bother with a shield in the first place?