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I agree with Alex R; take Erling and go for Chaos - Armageddon.
Erling is the best option in this case due to his starting spellcasting skills.
Moreover, priests who are protected from Armageddon become stronger, and together with similar Titans and Dragons, they will form a good survival team! Plus, there are runes that provide protection against elements.
That is:
Skilled Spellcasting
Skilled Chaos - Fire Power - Pyrokinesis
Defense - Fight to the Last + Resurrection Rune
Luck - Soldier's Luck
Either Education or Light?! - Protection from fire, but I haven't tested the second option; theoretically, it looks good!