I'd make a whirler. Put on goblin toe and you've got 25% CB at least. Even if the damage of your weapon itself is kinda lowish you will be able to get by with that. You can definetly get a char to guardian with that, even if it's not the best set around. Actually it might be half decent if you whirl through stuff and the ctc static goes off. I say give it a shot.
I used Hwanin's on a Werebear back in 1.09... I kept running into problems with the % to Cast triggers that locked my game up, so I left him around mid Nightmare. All that should have been fixed with 1.10, though. There are some good mods in the set, but I agree, you'll be hurting for damage. Crushing blow sounds like something to aim for
I, too, like using sets on characters, even the crappy ones. There's something cool about them that I really enjoy.
No clue what speed this weapon would make on a zealot, but you could even socket another shael/ias jewel in there for extra speediness.
May end up being pretty decent, if you add any elemental aura, although missing out on fanatism will reduce the attackspeed.
A cool plan though, two handed holy fire/freeze/shock aura paladin.
edit: german attack speed calc. gives 6 fpa for lvl 20 fanatism, 7 fpa without fanatism. And an extra 50% IAS needed to get to 6 FPA without zeal.
That's a shael in the weapon, and 30% from equipment. Quite doable, with gloves, ammy and possible sockets available.