no there wouldn't be a requirement to but it's nice to socialise and we tend to do x2 stuff etc on off raiding days like crab, T6 raids etc
Currently we have done all of kos except for the contesteds and the epic named in hos that damages armour.
Have MMIS upto mayong (2nd time in the zone) and haven't yet tried mayong. Doing FTH and CWM on sunday for the first time and have only been in EH once but did the maiden and had a go at prince thirgel and the tender of seedlings.