How much haste for raiding resto druid?

[Catilanniany-frostmourne]

how much haste should resto druid be stacking for raids?
currently at
21%haste
17%crit
8%mastery
9%ver

[Chaste-silver-hand]

30% or until you start having mana issues.

[Tubbly-terenas (Tubbly)]

So 10%?