WHAT ?!?! I never said I considered a 2HD weapon as an off-hand weapon.
Fact:
- there is a -1 penality to hit with an off-hand attack if you also have a buckler on your forearm. From a realistic point of view, it's probably because using a weapon with a buckler strapped on is awkward, which makes sense to me. From a balance point of view, the advantage of always having a shield ready is balanced out with a -1 to hit, which is fine to me.
- using a 2-hd weapon with a shield is awkward.
- there is no official ruling on buckler with 2HD weapon.
- the DM is tyrant supreme and may rule what he believes being fair for his campaign.
Opinons:
- Using a 2-HD weapon with a shield is awkward, therefore it should be penalized. Plus, from a balance point of view, you get the opportunity to switch from two-handed to one handed without having to ready a shield; it's already there. It deserves a penality which would be balanced. Two weapon gains an extra attack, two-handed gets extra damage.
Conclusion:
When I DM, there will be a penality to two-handed weapon with a buckler. When you DM, do what you will. Since this area is not covered by the rules, no twisted interpretation will settle the problem. It is DM's choice. This is not covered by the rules.
endnote: I would rather be going along these lines: The conceptor deemed it reasonnable from a balance point of view to penalize two weapon fighting with a buckler strapped. I'm pretty sure the same argument will hold with 2HD weapon, especially since 2-HD weapon is more efficient than TWF !!!!!!!!!!!