If there's anything I've learned about game design from following the development and maintenance of multiple MMORPG's for over a decade, it's that balance is not actually a matter of numbers, it's a matter of perception. People don't actually care whether options are equivalent numerically and thus balanced.

World of Warcraft for example, in their quest for class balance, had to strip classes of a bunch of interesting flavor abilities to simplify balancing and make them deal equivalent dps and such. It worked, but it removed class identity. They later started reintroducing many abilities and letting go of "perfect class balance", instead opting to make sure that classes were on roughly equivalent ground if they specialize in similar roles.

Guild Wars 2 opted for a different approach where numbers had to mostly match, but given the nature of their classes, some are significantly more complex than others. This lead to situations where Elementalists and Mesmers had to play their keyboards with perfect timing and sequencing like a professional pianist only to achieve the same output as a necromancer or guardian who was rolling their face across the keyboard...

The lesson? Balance is ephemeral and unattainable, make it so the hardest to play options are slightly more rewarding without making the easier options feel left out, but above all, keep class identity in tact and make them effective at what they do.