Leaving more of the group behind did not sit well with Clark, but he trusted Ralph and Ella. they were powerful within their own right. But more so, the fact that he also saw that Reese was separating from them to handle all the beasts that were attracted to the group.
This would leave them to face the large group of cultists with fewer strategies and less strength. But believing that would only make him weaker. That was why he trusted in Maria, who was pushing him forward.
"Increase the heat with your blue flames and avoid any attacks from the cracked steel minotaur." Ella was calmly standing back as Ralph dodged the attacks of the minotaur. She was keeping herself calm while telling her beasts what to do.