The blasty (idiot) sounds like he needs some Warlock fun. Suggest Eldritch Theurge; point out that it let's you fire explosive blasts out of your hands and into someone's FACE! Plus, A build like this:
Warmage 2 (Precocious Apprentice for a 2nd level spell)/Warlock 3/Eldritch Theurge 10/War Mage 5 is actually semi-good (for a blaster), due to how he has CL 17 for Warmage, up to Greater stuff for his invocations (he'll definately LOVE that blast essence that grabs you fire damage to your EB and lights people on FIRE!) Of course, ET let's you add Essences to your spells and spells to your essences, and he can blast literally all day...
See if he'll do it (unless, of course, he hasn't picked Precocious Apprentice, which would be stupid of him, since it leads to more powerful blasty sooner (at least, in his mind that's a good thing)), and get him to grab Hammer Blast as one of his first Essences; tell him it lets him shoot through walls (it technically just does full damage to objects, but hey, why disable traps when you can just blast 'em, right?)
Searing Spell will be necessary, but I think he already understands that. Besides that, show him Mortalbane.