yeah that happen often, but just need to focus on those at 1 and 2 position as are only ones that can really harm you, and also have low hp , try to get in your groups at least one fast heavy hitter in order to take them down before they can self destruct, one good option is a ranger with speed boots and long bow, use supressing fire skill to daze them allWhen your first battle in lab - 4 weakness scanners. (Fast speed monsters, with self-destruct), met in adept difficulty View attachment 3559020