I've got a bladeforged Sorc-11/Pally-2/Fvs-3 now (going for something very similar to the spam machine build Sorc-14/Pally-2/Fvs-4. Right now I'm seriously loving the 3 fire savant SLAs---having 3 points in all of them. With Maximize, empower and quicken, they seriously rock the house against anything without evasion or fire immunity. How long can I expect this to continue assuming I run standard heroic elite for bravery bonus? Can I meaningfully extend the lifespan of these SLAs by taking heighten at level 18 and slapping heighten on all of them? I'm running with 18 base charisma at level 1, +4 tome, all level ups to charisma, and the best +charisma item i can lay my hands on as well as evocation focus 2 on my trinket. Or would buying spell focus:evocation be the better idea? I know I can swap in the +5 evocation necklace from eveningstar but that'd come at the expense of my smoke GS HP item. Any thoughts? I'm particularly interested in the road from 16th-20th. After 20th, well, I have a fully tricked out shiradi destiny waiting for me and a mostly tricked draconic one as well.