I tend to use the enemy list for target-cycling rather than Tab cycling in the middle of a fight... Not because it's the most effective/practical way, but because it's the least ineffective way. That should not be the case.

Tab/single-key targeting should not be this cumbersome. I've even had to resort to click-targeting mobs on many occasions due to the unreliable/inefficient nature of the other two methods... and the click-targeting is just as bad! It just feels gross, and the entire system needs to be improved on.

Implement more ways for the player to dictate targeting behavior. Options for maximum targeting range, cycling behavior, etc...

There should even be an option to circumvent all of those settings, and have the targeting behave identically to games like World Of Warcraft, Aion, and the like.