Best way to get fusion stones?

Yeah, I'm going to need a lot for getting Master Talia, so I was wondering what was the best way to get fusion stones.

Best way is using your pal points for normal summon, then refining them all. Fusion stones are available in the shop for gold and pal points, but with the ability to summon 2*s, you get more stones from summon/refine. Also refine any extra 4 and 5*s you don't need. I save 3*s to max lvl and fortify into my main heroes, but everything else gets refined.