Been using Royal Griffins a lot this last game and thought I'd present a list of stacks, strats & info to realize the maximum potential for the Royal Griffin.
Everyone is encouraged to include their own information or corrections, this could be a comprehensive strategy guide for Royal Griffins.
Stacking as many of these as possible makes the Royal Griffins one of the most powerful strategies KBAP has to offer imo.
Use of the following spell combinations cast on the Royal Griffin:
Use of Inquisitor & Arch-Mage allows more power-ups combined in the first 2 rounds.
As Mage class more effective & more powerful spell empowerment's per round. As Warrior class higher attack/defense rating.
Bless/Holy Rage (by Inquisitor) (Bless: guarantees maximum damage is always inflicted. Holy Rage causes 150% damage to Demons & Undead)
Magic Shield (by Arch-Mage) (causes all damage suffered to be cut in half, especially good when suffering heavy damage)
Berserker III (increases attack rating, extremely effective on the RG)
Hell Breath (increases damage inflicted, best combined with Bless & Berserker)
Magic Spring (especially good for a RG positioned right in the middle of many enemy units receiving many blows, if mana is needed)
Stone Skin (usually provides better defense than Magic Spring if mana isn't needed, but reduces intitive -1)
Divine Armor (provides resistance to all types of damage, especially good when fighting enemies doing a lot of special damage types like magic, poison or fire. Or when stacking special resistances to achieve almost total immunity from certain attacks)
Target (Cast on the empowered RG, enemy units will make a special effort to attack the RG before other units, further exploiting the empowerment's and always retaliation of the RG)
Use the Paladins
Second Wind talent on the empowered RG to get the most out of their spell empowerment's. (2 attacks by a powered up RG in 1 round is ruthless)
Phantom spell the RG. (extra Cheer, Angelic Guards & Attacks)
RG's
Summon Angelic Guards.
Do this every round to flood the field with Royal Griffins, Angelic Guards and to keep your human allies "Cheerful".
The 2 essential super excellent griffin items:
Portrait of the King of Griffins (Artifact: +5 defense for all units, +2 morale Griffins) (allows RG's to cooperate with dragons with no penalty)
Griffin's Banner (Regalia: +5 attack of Griffins, -20% leadership of Griffins)
The lesser griffin item:
Golden Feather (Regalia: +1 speed of griffins & 1st level creatures)
The mind skill
'Voice of the Dragon' (up to +2 morale for animals).
The
Blue Dragon Pet (+1 initiative for animals)
RG's are
Furious (always retaliate). (Especially effective when the RG is thrown right into the middle of many enemies. Makes highly efficient use of the empowerment/defense spells)
RG's have innate
+50% Magic Resistance. (Making them excellent for attacking Evil Gremlin Towers or any enemy that attacks with magic type damage)
RG's do
Double Damage to Dragons. DDD

RG's provide
+1 Morale to Humans & Griffins in the party.
RG
Cheer talent +50% attack and initiative for humans & elves, 2 rounds.
With Mage Amelie
Going up against any enemy whose main attack is physical or magic type this empowered RG stack will prove invincible.
70 Royal Griffins eliminate the troop of 62 Black Knights
Some possible move combos for the first 2 rounds:
(just loose basic ideas, certainly many order of operations possibilities)
(1)
Teleport Paladin strategically to enemy front lines
Move Royal Griffin near Paladin
Summon Angelic Guards
Arch-Mage cast Magic Shield on Royal Griffins
Inquisitor cast Holy Anger on Royal Griffins
Demonologist summon demons
Paladin 2nd Wind Royal Griffins
Royal Griffins cast Cheer on Paladin, Arch-Mage & Inquisitor
Inquisitor cast Holy Anger on Royal Griffins
Cast Berserker III or other empowerment's on Royal Griffins
(2)
Move Royal Griffin strategically into place
Cast Phantom on Royal Griffins
Royal Griffin summons Angelic Guards
Arch-Mage cast Magic Shield on Royal Griffins
Inquisitors cast Holy Rage on Royal Griffins
Demonologist summon demons
Royal Griffin (phantom) summon Angelic Guards
Paladin 2nd Wind Royal Griffins (real) for attack or Arch-Mage (for early trance/crit strike)
Move Paladin
Royal Griffin (phantom) Cheer or attack
Royal Griffin (real) move into position
Cast Phantom on Royal Griffin (real)
Royal Griffin (real) attack
Continue Mana Accelerator + Phantom Royal Griffin + Summon Angelic Guard every round for Griffin flood
(3)
A variation can be included in any army consisting of RG's & paladins where Phantom is cast on the Paladin (instead of the RG) with the intent that the Paladins 2nd Wind talent is used on the empowered RG to further exploit the RG's empowerments.
Those poor elves. The noble Paladin shows his remorse for the hopelessness of the situation.
It was destined for doom. The elves have no place to run.