whats going on with Ritual?

Hello,

I deffered (or how its written) an invite. I did 15 maps same level with ritual and it never came back.

In these 15 maps I had 0 tablets -_-

I run maps with towers with q+q, pack size, magic monsters etc and 104 rarity.

took me 35 maps to get my first boss invite out

The drop rate for Ritual tablets seems way lower than the rest. I've used mine to buff up a big section and now I've almost done all of the maps and didn't get a single tablet out of them. Really unfortunate, but at least I got one invite to show up.