You forgot to mention that not only can you make a Potion to increase Destruction Damage %, but you can also make a Poison to weaken your victim to Magic/Elements. Just apply a Weakness To Magic/Weakness to Fire poison to an arrow, shoot them once, switch to dual Fire spells, drink your Destruction potion, and watch the SoB scream "I'M MELTING! I'M MELTING! MY WORLD! MY WORLD!" as you proceed to turn them into a pile of ash.
They don't want to be active.
They want to play a passive boosted class.
In Dungeons and Dragons my Warrior wore plate mail and swung a massive two-handed sword. He had a bag with some food and a potion. It was basically auto-attack. A very passive playstyle but did lots of damage.
And I remember my Mage having a Bag of Holding full of staves, wands, scrolls, potions, spell reagents and a dozens of spellbooks. I had a familiar and I had to prepare for fights with buffs and traps and then use every spell I had memorized. He was very active. I didn't just cast Magic Missile...
There is a difference between playing passive and active. Final Fantasy Warriors basically auto-attacked while the Mages always had to go through and find the right spell for the right situation, even if it was never Fireball and it was always Sleep... I think that form of game play is lost of people today. They play games like WoW or Rift where all the Mage does is stand still and cast Fireball.
A perfect example of this style of play to me is 3 bandits up ahead. You cast a rune on the ground infront of you. You Frenzy the caster and let him get killed by the other two bandits. They come running for you. You Pacify one on his way up to you and the other sets off the rune you laid. You quickly paralyze him then fire a couple spells to kill him. Set up another rune and then use your staff to kill the remaining bandit before he gets to you. It's complicated, you gotta do it just right, but you're a Mage, you have to think.
My Warrior holds up his shield and swings when he can... So fun...