On Ifan the wizzard I would like to point out one thing...you don't need high hydro at all for the dps. You could go Aero and use water ballons/grenades which are a safer option (in my opinion) for creating wet surfaces. Another safe route for creating safe water surfaces to electrocute is ice fan into ignition,that costs 4 ap but has the value of 3 water grenades. With Ifan you are better of going max summoner, 2 aero, 1 scoundrel and 1 necro,with gear that buffs summoning and aero and if you want greedy and love high risks you could go 1 wand+grenadier talent
Also I once had Sebile as a cleric and if you get con to 16,that was enough for to manage the con penalty of her blood sacrifice while under statuses that reduce condition and not lose my shield in combat...so what you should be getting for a cleric is 14 str (for high lvl plate armours),14 con (16 if elf) and lots of Int (because +wits and +ini gear are common like fish and chips in the uk) and that Int also counts towards how much armor your spells restore, if my understanding of the game is correct.
Also,I have to ask,why at least 1 Necromancer on Red Prince,is it just for passive heals?