So, wound up rolling up a scrapper with battle axe to see how it compared to my recent tanks journey. Super Reflexes fit the concept better.
I'll have to say, without making a careful build, they run out of endurance easily. Even with mitigation via sets and slotting. I do remember endurance being a bit of an issue with the tanker as well. Overall, Ax is a fairly thirsty set, so I can see some call to reduce end use there.
On Pendulum itself: Damage isn't too bad, could be a little better. End use, probably drop to 12 and maybe drop the recharge to 12. I'm OK with leaving the knock chance at 50%. Targets at five is fine.
Axe Cyclone: I'd raise it's knock chance up and bump the damage up a little, recharge down a little.
Still having a lot of fun with the character