Enhancement Shaman (WotLK)

Hi I just started an enhancement shaman with heirlooms, and I was wondering what enchant, since I got 2H heirloom axe atm and when I get to lvl 40 ill dual wield 2x heirloom 1handed maces, should I enchant these 2x 1handed maces.

Few people I asked recommended me either Mongoose on both or x2 Enchant - Exceptional Agility on both, which gives you +26 agi on each mace as most of you know, OR 1 Mongoose and 1 w/ agi, but I really dont know which to choose so I wouldn't mind if someone helped me out here please. :D

U can enchant heirlooms only with enchants that have no level requirement.
15 agility is probably the best enchant in ur case.

Thanks for reminding me that, I forgot that you can only use non-lvl-requirement enchants on looms. I guess ill go for +15 agi then, thanks again