disagree 100% ,full chamelean wasnt easy to come by meaning you couldnt get untill you reach lvl 20s for the strong sigil stones unless you glitched or cheat to get to 100+ chameleon
Yes, yes it was.
5 grand soul gems, an illusion skill of 50 and the ability to cast a chameleon spell (could be obtained at level 1 if you never went to bed and did all mage quest until you had access to the university) was all you needed.
One of the daerdric quests gave a ring with 35 chameleon at level 10
A sigil stone with 20 chameleon could be obtained at level 9. Now the trick is saving before you loot a stone and then keep reloading until you have the sigil stone you wanted (or dupe them). (10-15-20-25-30 = amount of chameleon/grade of stone).
Invisibility is/was fine, chameleon wasn't.