Differentiate pure heals and shields?

[Raikai]

kinda just chit-chat, right now there is not enough distinction betweene shield and pure healers, but come 6.0 hopefully we are given justice ,honest opinions, how would you guys decide to make pure heals and shield work differently from each other, and yet keep their effectiveness, or have a different advantages in use?

I think some nice ways would be to leave pure heals and regens as they are, but make shields act differently -- like making shields a whole lot more effective (like , big enough to be a second health bar), but actually giving them a bigger cooldown, or forcing them to be channeled instead of casted -- preventing damage to the target, at the cost of the caster's MP.

any ideas?

Question: Isn't the differentiation being Regen x Shield, instead of Pure heals x shields?

That was the impression I got... "basic" heals would be for everyone, but part of the healers focusing on regen effects to supplement that and the other on shields.