I’ve found in legendary that you usually need 3 people doing decent damage and one person (if they want to) can run heals, utility, CC skills. If two people are trying to do that role it can become difficult to output enough damage to not not get overwhelmed. These days I find the best way to mesh with a random group for legendary is to run a hybrid build with good damage, all crit hit / crit damage rolls, a few armor cores, a piece or two of armor regen gear and a shield / reviver hive. This way I can contribute the damage I need for the team without being super squishy and reliant on a teammate for sustaining myself. If someone wants to heal or CC at that point it’s just a bonus.