Auto cast Abilities < Manual use
I'm not sure, honestly I feel that auto casting abilities is kind of a draw back in a way for laning and such where you want to focus on farm and harass to you opponent I am a manual user because i find that I can harass much better with better timed placement and as well as strafing out the team fights, kinda like when i played Syndra's manual spells vs Karthus auto Q instead of clicking to place, and its the same for me scaled down to melee champs from zeds Q to Yasuos Q. Is there any perks to the auto cast thing that anyone can tell me so i can make sure that i can make an accurate desicion of what i chose.