Here is a good strategy if you are short on hammerdins
All you need is one hammerdin, and a paladin leacher(optional), a med merc
The hammerdin spins as normal using concentration in the normal spot, the leacher paladin stands next to the bwer and using cleansing, it is possible to do this without cleansing if you have an enigma, but it is nice to have cleansing on.
I've done this many times, and often do this to level up my smiter, I just stand with my smiter on cleans while the hammerdin goes to work...
Hope this helps!