So my point is that Dain is a Leader of its Factions and is a Dwarf(which are much more powerful physically than Humans) and is an Heir Of Durin is probably even stronger than most Dwarves especially as Lord Dain when he is in his prime!And as one of the Greatest Dwarven Warriors ever and especially during.the Third Age I think he should get some Knockback and Area DMG to represent his Leadership status and Physical Strength with that Mighty War Hammer! :-)
Yes, it could be a valuable addition :)
He can easily 'deserve' this tool as the Leader of his faction, the lore indeed tells us that the Dwarves are obviously overall more resistant against Magic and stronger than Humans, and in BOTFA we clearly saw the display of Dáin's physical Strength in the heat of the Battle.
However, it's crucial that this hypothetical knock back effect remains very 'moderate'; 1-2 units involved, for example.
Hmm, well Dain from the Iron Hills does have his boar, so that is a form of knockback I suppose.
This is the usual 'charge' effect that most of the cavalry units and heroes' Mounts of the game has.
Every mounted Hero has it,we are talking on foot that only leaders and characters who are noted to have great physical strength and similar fighting style! :-)
Or enormous magical powers :P
(http://imagegecko.net/upload5/Galadriel%201.gif)