Building a character with either full Holy Vindicator levels and a full Cav mount (with the Horse Master feat) or some combination thereof. What domains and/or cleric archetypes are fine if they don't progress?
The idea is a support combatant, ideally not lawful and not evil and channeling positive energy. Most likely Gnome riding a Wolf (for CON bonus and SLA/Speak with Animals). Order of the Star. Cleric of ???
