Levels 1-3 are easy to do with 6 people if your inbetween 360-370. But 4-7 you need to be 380 because everything is at 385.
Your a 352 light trying to beat a 370 light activity. You aren’t going to do great regardless, I only got to level 6 when I played with 9 other people when I was at roughly 348 light. You should focus on getting your light to at least 360 before going into escalation protocol.