Levels too difficult in two places

The current boss event has me trying to fight a lvl 560 boss with a lvl 460 or 470 5* (and I can't stun ANY of them). It is nearly impossible. The same thing always happens in the SHIELD for a measly 4* cover, only there, I have fight three of them. Could you please reconsider having such a ridiculous lvl disparity for ANY node?