Following the summoning method and noticing the volume of successful 30-pulls on the Atlantis summoning thread, I did a 30-pull instead of a 10-pull. The results were wild - six 5* heros including 2 HoTM! I agree with what most of you have said and @Suicide_Bunnyid is dead-on accurate in her statement, but I thought I would share this result anyways.
This was the only 10-pull or 30-pull I did since the start of the Atlantis event last night. Only reason I did 30-pull was due to the feedback on the thread, 
[September 2020] Atlantis Summon Results