Any idea of combine weapon that you actually think it is good example?

So far, I have tried a few choice but I don't really see much benefit at all.
Currently I try Wand/Rod so that I can regen PP from far away, but then I don't really melee much at this point, so I wonder it is almost same as using Rod...
not many resource to try many stuffs tho.. any example that you find it really good?