Quote Originally Posted by Lilyth View Post
Diversion IS 100% demanded.

For casters you only really need Swiftcast, Lucid and Diversion. The other two are freebies depending on the encounter. Are there knockbacks? Surecast + Manashift. Healers need help with mitigating magical roomwide AoEs and are there knockbacks (God Kefka)? Addle + Surecast. Are there heavy magical tankbusters + heavy roomwide AoEs (UwU)? Addle + Apoc.

The only real exception here is the SMN who needs Addle for an extra Wyrmwave, but even then you would be better removing surecast than Diversion which wouldn't really impact such a mobile class.

Also, this argument is soon to become irrelevant given how all 10 Role Actions are to become available for you in the future.
It also depends on class. SMN pet is doing big part of your dps and pet have separated enmity generation compared to your main character. So you theoretically do like 25% less enmity all of the time. Even for world first UwU kill summoner did not use diversion.