Yes i did. Lets take Dark Souls III for an example, and man, I love Dark Souls. Played all of them, including Demon Souls. But what you literally do in pve as a mage/pyro/whatever is spamming your strongest Spell. In 90% of pve situations there is no need of changing the Spell..
DS3 doesn't use spell slots. But on DS1/2, you save your soul spears to when it is necessary.
Lets pick the strongest dark magic spell on DS2 as an example. To learn Climax, you need to : - Find 3 hidden locations - Join a covenant - Clear 3 caves - Kill darklurker, the strongest boss vs dark in the game - Have a high amount of INT and FHT - And it takes 4 ATN slots - Also costs ALL souls to deal considerable damage
If this spell comes to a wow clone, it will be just a spell that everyone learns at lv X, has no stat requirement and scales 100% with the player gear with 20 minute cooldown.
And here is a guy soloing Lantern king on PF:KM
He is using a lot of different spells.
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The problem is that you are seeing a spell as the "best spell" in any situation... A"best spell" should't exist. What should exist is for eg, the best spell vs undead at CQB, the best spell vs flying monsters at long range who aren't resistant to fire, a most resource efficient spell vs trash mobs(...), or the best spell vs mobs "A" in situation "B" under "C" circumstances if you have "D" party members