What level is the content?
Yes, you are upleveled to 80. I got through the 3rd level of the tower on an upleveled lv ~27ish Mesmer (of course not alone). I even did some of the Nightmare Chambers with her and although it was challenging, it was do-able.
Also, heads-up to anyone you unlock the golem transport to levels 2 and 3 per character, not account-wide.
Thank you for your answer =)
The mobs are lvl 80+ (I’ve seen lvl 83).
They hit pretty hard. It’s probably gonna be harder for up-leved characters.