Damage difference between full line and half?

[TanithScout]

IIRC more skill points increases the base damage which is formulated with the 'dmg stat' co-efficient. It's more damage, but is it worth more abilities? Your choice.

[wonshot]

Since respecing is free you could go respec all your points, check the tooltip damage of one of the mastery-related abilities, put one put. see how much the tooltip damage increased, then put one more point etc.

Did something simular on BW, 1 mastery point into aoe tree gives roughly 4tooltip damage on aoe abilities, and like 12damage to boiling blood.

[CountTalabecland]

With the Ironbreaker builds being as they are, likely not enough leftover to matter. Depends a lot on what you are planning on doing while 2handing if I am reading your original point correctly.