I like the ideia of healing through
Dawn Lance to begin with,
Floral Grace is also good yet the problem with the set resides with
Argent Smite not complementig very well the set with it's low healing capacity as
Dawn Lance sometimes alone doesn't do the trick if
Floral Grace is on CD.
Thats why probably
Shield of Light would do an better job with it's shielding capacity when
Bleeding or
Corrupted Blood occurs (even though you lose potential offensive capability).
It could be the above or probably an change to
Argent Smite to heal with scaling % that is not dependent on damage dealt or though directly scaling through spellpower instead so to heal better, consequently
Smite Evil's healing would go up an notch aswell.
As last probably changing
Floral Grace's periodic healing from heal to
Regeneration wich would be better in terms of countering
Bleeding or
Corrupted Blood more efficiently.