[QUOTE=Deadalready]Well I'll try and answer the questions if no one else will try properly.
1: Mindlflayers were apparently originally able to see invisible monsters in Baldur's Gate 1 and so were given back their ability to perceive the invisible; the benefits of seeing invisible is being able to target them reguardless of protections.
2: Spell Immunity unfortunately does not protect against area effect spells not centered on the caster, even then protection against an area effect spell targeted directly against the caster is still dubious. Timestop, Cloudkill, Fireball, Skull trap and many other area effect spells are examples of spells that are not negated by spell immunity(!).[/QUOTE]
spell immunity does protect from skulltrap.
time stop is in a special class by itself.
the only way to protect from timestop is to cheat.

They call me Darth...
Darth Gizka!
Muwahahahahhahahha!!!