Normal is probably the easiest of them all. Veteran is about the same difficulty as AA and Hel Ra, aka very much so doable by most groups after learning mechanics. BUT Olms+1 or Olms+2 is more like vHoF and vMoL HM, really fricking difficult.
If you do all bosses seperately, it's not that hard. It's easier than vHoF and vMoL. It just need's a bit of movement but you don't really need high dps.
I find the normal AS way harder than the normal craglorn trials in pug, the latest feels like vet fungal one, you can die during first run if you mess up. nAS is much harder, think vfungal2. , no its nothing wrong with it, even normal trials should not be normal dungeon pugs, cp 160 is an requirement to join anyway.