I don’t have the best answers out there but I think you will want Pyro3 for the extra hits from fireballs & pillars. Here’s several build I think would work out.
Wiz > Pyro2 > Link2 > Pyro3 > Link3 > Sage
One can’t have too many links. XD
Wiz > Pyro2 > Link2 > Pyro3 > WL> Sage
I suppose Pole of Agony would add a decent bump to your DPS.
Wiz > Pyro2 > Link2 > Pyro3 > FF > Sage
This would probably be the worst of the 3. But I’m just toying around with the idea of Kurdaitcha: Enhance attribute.
Increases the chance to hit with twice the normal damage to enemies hexed by [Kurdaitcha] (or any other methods) by 1% chance per attribute level.
Max Level 3.
So… you technically gain a a soft 3% boost in DPS to you and your party members. You can also maintain a 100% uptime on this debuff with level 3 bone pointing.