How about this...
Bandolere of grenades: Napalm 2D6 RKA +2 stun mod,Explosion. OIF (bandolere) 8 charges No KB, Full effect Total lims 1 1/2 cost 24
Band of grenades Entangle 4D6 explostion OIF,8 charges cost 30
and Darkness/smoke grenades Change environment -4 Per Long lasting , around 64 radius OR Darkness...but I don't have those rules memorized OIF ,8 charges 30 points Total cost 84 points...thats close to the cost of the Multi-power and now you can multiple power attack all three as you wish, you spent the points so use 'em as you will, if you Rapid attack you have a Autofire effect at a small penalty........