I don't use axes or flail for reasons other than Throwing them. And for bags: They are expensive and they do the same type of damage as axes and flails do (random) and you can't throw Bags.

But! Bags are good for MAKING money!

You need a duplicate trick:

Buy ONE Bag for say Agrias then go a shop that has no weapons that are stronger than the Bag. Then put another Bag or weapon where the shield is and choose Best Fit and quit fitting. Do this many times and sell the extra Bags.

This duplicate trick is easier than the '2 swords' one, as well. Good for making Excaliburs and stuff. *coughjavelinIIcough*