Diana vs akali vs zed vs katarina (low elo)

Akali is least complicated and rarely banned

a good zed will completely dominate the game. he exists for mid laners to assert their dominance and mechanical skill up through platinum, they just want to climb on their smurf already.

akali is a stack check but the best at just picking off carries immediately. do not run into akali into the jungle.

diana is the most durable of the bunch and the most reliable.

kat is the hardest to pull off, if you can play kat you would already be in diamond. now since you're not in diamond.... you cant play kat.... make sense?

if you're actually silver/gold material and just looking to rise a rank or two then the best options are zed and diana. you will gradually learn their mechanics, which are more forgiving, and as you get better with those champions you will see noticeable gains in elo.