I ran the raid boss 6 times at X2 power. Gives lvl 100 and two 20s usually. I got an additional lvl 100 manyu 1 time. The counter team did the best. Going to load up on manyus this weekend!
I have a relatively hard time spawning SGs as well. Yesterday, I even had to do a Character Story map to clear the daily mission for SGs. And it looks like I'll have to do that again today.
I blame the RNG gods !!!
Nutaku ID: 556500612
It's a small comfort that once you've beaten the four 'normal' event bosses the super boss can be fought as many times a day as you have spare tea sets. I bought another set of five tea sets just in case but it turns out my squads were strong enough that I only had to use two of those five.