Kirkhammer is much better than i initally gave it credit for
You REALLY need to understand its sweetspot mechanics to get the most out of it. Not to mention it seems to do more damage if you somehow get its swing to hit enemies on the head.
Also.... The second swing after the charge R2 is bananas and sends even the Big enemies in the Cathedral flying.
Pump Stamina for sure to get those sweet sweet follow up attacks
I'm mostly using its short mode right now. With enough endurance you can just swing like 5 times in a row and it goes through a nice combo thing. It also has better reach than the saw in short mode and is faster than the axe.