Sorry, MT is Mystic Theurge. DD was Dragon Disciple. EK was Eldritch Knight.
The basic party of 1 trick done on a Cleric would require a Domain that gives a full scaling Animal Companion or taking the feat that raises Druid level by 4, Skill Focus Knowledge (any), Eldritch Heritage (Arcane), and then Improved Familiar. So a base Charisma of 13 and 3 feats.
Unfortunately I am afb, so I can't do much to help with Inner Sea Magic.