Hack and Quak is what, 20 mins? I doubt you could get down to the boss and kill him in under 20 mins, at lvl 24 the last part of the dungeon is orage-redIf you have good enough AC it hits for 100 min damage.
Dr Hack N Quack heals over 300 every 10seconds and if you get an essence you can add another 700-1k hp to your character.
So all you really need to solo this guy is a large amount of NCU and some obvious stratigies (root and run while HoT heals you, or just run and get him stuck somewhere).
-Jax