Why does it deal the same amount of damage as thunderlords, have a shorter cooldown, and increase 6-12% damage afterwards? Thunderlord's has the added bonus of allowing spells to proc it, but shouldn't press the attack have a higher CD than 6 seconds?? I was looking at runes to experiment with on senna when i noticed this. (I don't adc.) Just seems odd is all. Is there a downside to it or something?
Because electrocute is easier to proc. There is a lot more risk involved with dedicating 3+ autos on a target for most champions. Even the champs that can do this well and quickly are either melee (sett) or short ranged and use their escapes to press forward to proc it (lucian)
"thunderlords"
I... ok, well you probably mean electrocute... I guess.
Additionally to what Pika Fox mentioned, there is also the fact that Electrocute's proc damage scales with AD and AP, while Press the Attack's proc damage doesn't.
To further add onto pika and chem....
It is also a completely different tree. Press the Attack is generally paired with Triumph, Attack speed/lifesteal, and quite often Coup De Grace.... therefore, auto attack buffing, additional gold and heal on kill, and more damage when enemy is lower. This works on marksmen mostly, or some melee with gap closers.
Electrocute.... is all about instant damage and flat out increasing damage or scales with kills. Most who electrocute have the Lethality increase/magic pen, then some early game minigame stuff for damage revolving around vision, and then you need kills for either move speed/item cooldown/ultimate cooldown/spell vamp..... usually for mobile in and out damage dealers.
While PTA may have the chance to deal as much if not more than Electrocute.... Electrocute probably gets proced more often than PTA even with its shorter cooldown.
