Originally Posted by
Afania
They are not, actually. Delve is very easy, most endgame LS can clear delve2 with 100% win rate and sell wins. Incursion is only hard when you build up the lv or set a goal such as "kill all NM in 1 run". If you only play lower lv and not aiming to kill all NM in a single run, it's easily doable with PUG and wide variety of setup without a risk to fail.
Higher lv BC is a bit harder than delve/incursion IMO, but that's mostly because you need merits to enter, so it's harder to find skilled player willing to do VD together. So I almost always PUG for BC, making VD a lot harder. Otherwise VD isn't that much harder than delve when you go with friends/LS.
IMO none of the current event(barring optional goals like super high lv incursion aiming for all NM clear) are harder than many other events in the past such as legion or Einherjar T3.