The Gargoyle is a big monster in the beginning, but for maxed heroes, it's just another Gargoyle. It's not the end of the range.
In the topic "Hydra!" I once made a calculation what would be the stats if you make a quest with only one single monstermonster challenging enough to be interesting for maxed heroes.
Those were the stats I got:
AT DE BP
8 8 44 (well, 44 BP is kind of ridiculous
)9 9 33
10 10 26
11 11 20
12 12 16
13 13 13
A sleep spell should be defended by this kind of monster.
