Celtic Heroes

Hey guys, i cant seem to get fireflight and frostharrow. Is there any tips on making them spawn quicker. The others spawned several times after i killed, but i have yet to see these two. Please help. Thanks!!

Patience.. and farming!
To make them spawn quicker, kill all the white wisps over and over again.

I waited for skydancer a good 30-40 hours so yeah lol.

Waiting for bosses and such is a part of the game, it would be way to unbalanced if there was instant spawns on bosses. Just stay patient and make sure to be around where the boss once spawns, cause it will. And belive me, once you get something you've really worked for it is a great feeling.