Yes, autoclicker and killaura are both PvP hacks. :P To be honest, your either good at PvP, or your not. You can learn to a certain extent however.
Aimbot can be applied to both melee and ranged attacks. Although aimbot for a ranged attack, like a bow, is usually called something like, "Bow Aimbot." Where as melee aimbot is usually called, "Force Field" or, "Kill Aura." You'll usually find the word, "aimbot," applied into ranged attacks.
If you need help PvPing just look up some tips and tactics on YouTube. Try finding specific things related to the type of PvP you're interested in. For example, if you are interested in PotPvP, you would need to look for specific tips for under that style of PvP. Remember, practice makes perfect!
I brought up autoclicking which just makes you click uber fast. It's considered a macro not a hack. So gtfo noob
Or you could be a normal human being and use the macro program in with your mouse and make it a macro???