Mass Summoning
While Michael was away, Blaire Tracer visited the lizard cave several times.
She used the GPS treasure map to travel through the cavern system and took notes about the variety of monsters underground, their habitats, and the location of exposed ore and Gloa Crystal deposits.
Blaire even wrote a full report about the cavern system, which included a grading of the monsters' power level. She couldn't determine the exact power level of the monsters she encountered, but their presence gave her a rough indicator of how strong they were.
For example, the Warriors in Michael's territory received 0.8 points from Blaire, while Tiara received a 1.7 as a level indicator of her combat prowess.
That way, Michael could roughly gauge how strong the monsters in the lizard cave were and which cavern tunnels he should avoid for the time being.