need help on a divine build

[Deca4531]

so im building a tank character around divine meta magic and persistent meta magic (been done 1000 times i know.) anyway i have a base idea as to how to best go about this but additional advice would sill be a great help. so far the build breaks down like this.

cleric or Archivist (PHB pg 30)(HoH p82)
LV1 Cleric 1
LV2 Cleric 2
LV3 Cleric 3
LV4 Cleric 4
LV5 Cleric 5
LV6 Cleric 6
LV7 Cleric 6/Sacred Exorcist 1 (DotF p68)
LV8 Cleric 6/Sacred Exorcist 2
LV9 Cleric 6/Sacred Exorcist 3

after lv 9 add templates:
Saint (BoED p185)
Fire-Souled (DR314 p23)

feats:
human: Nymphs's kiss (BoED p44)
flaw: [Metamagic +1]Extend Spell
LV1 [Metamagic +6]Persistent Spell
LV3 [Metamagic]Divine Metamagic
lv6 Sanctify Martial Strike (BoED p46)
lv9 Nimbus of light (BoED p44)

the saint template requires i have 3 Exhalted feats and be at least lv6 (they are the ones from BoED) and im only aloud one flaw. i wanted to go Lesser Aasimars as a race but i cant afford to loose the feat. i dont want to slow down my spell progression, and Sacred Exorcist grants you spell advance from an existing class, as well as Extra Turning feat 3 lvs in (only reason i threw it in)

i know there are better "tanking" builds out there, but im also doubling as the party healer as well. so i ask the masters, what can i do to better improve this?

[docnessuno]

Taking the planning domain will grant you extend spell, freeing up a feat.

[Deca4531]

Taking the planning domain will grant you extend spell, freeing up a feat.

Wow i didint know that, that alone will help a lot, thank you.