Definitely feels like during the event my refinement chance is improved though (or I'm just incredibly lucky during the event). I was getting refinements with 2-5 low refines, 5-10 medium refines, and the best luck of all I refined from level 7 to 8 with just TWO advanced refines.

I know, thanks! I was so in shock that my hand still kept clicking and I ended up using an extra 5 towards level 9 refinement, so in the end I just decided to use everything towards it (over 150 and nothing :L). I'm already quite happy though.