It's never really "that simple" lol. It's always going to depend on what you fight.That simple? Back and forth?
Energy = Ebolt? or Death Ray? Yes - Death ray if you won't be hit but ebolt if you will be. If it's a single target (nothing else around) Chain Lightning will be more than ebolt
Fire = Flamestrike? Yes - always corpse skin first though
Cold = ? Wither (hailstorm if you have mystic over necro)
Posion = ? Poison Strike with corpse skin first
Physical = ? Earth Quake