So, with the latest dev build WaterArms got added into the core, i think Jed did a great job on it, and this post is in no way ment as hate, because i love the ability aswell
But, having pvped and played around with waterarms, i think it's a little to strong for a default move, and that it needs nerfs.
Simply saying to change the configuration is not an excuse, PK should have a balanced config, if "just change the config" is an excuse we might aswell make everything a 1 hit kill, since you can just change it right?
Punch Range
I think the punch range, is to long. it's about the range of a watermanipulation and that really shouldn't be like that. and it's an arm, i don't think an arm would reach that far, and the fact that it can be spammed while having such long range can be pretty annoying in fights resulting in negative experience for players
Cooldown
The cooldown of such a strong ability is way to strong, you can waterarms up about 90% of the time, increasing the cooldown would add more counterplay, being able to strike when their waterarms is down, and it would also force waterarm users to make be more careful in the decisions they make "Should i use my last arm for a spear, and sit through the cooldown, or safe it to escape with grapple, or knockback with punch"
Grapple
Grapple is way to strong, and completly replaces waterwave if you want to climb something/get up something. You can easily climb a 100 block wall. If you don't believe me i can show you how easy it is. but that's not the point
Grapple gives the waterbenders way to much climbing/mobility potential.
The amount of uses on grapple should be giantly reduced to prevent waterbenders from just going straight up a wall and then swinging like a spiderman from place to place
Pull
Reduce the distance the player is pulled. this move is basically an airsuction that can be spammed over and over again
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I'm a main waterbender myself, and i think the move is great for waterbenders to defend themselves on land, but in it's current state it's way to strong for a single move