Can a witch scribe a scroll of Haste if he intact has the Time Patron.
Yes.
Starting with level 8.
I always thought that the spells were one component of crafting you couldn't omit.
I always thought that the spells were one component of crafting you couldn't omit.
This is correct. You cannot create potions, spell-trigger, or spell-completion magic items without meeting their spell prerequisites.
Scrolls are spell completion items, and thus their spell prerequisites cannot be bypassed by increasing the DC.
Yes.
Starting with level 8.
You can actually scribe it earlier than that, but level 8 is the minimum to be able to do so without increasing the crafting DC.
Unless I am missing something, don't you mean 6th? Haste is added at 6th level with a Time (or Agility) patron.
Oops, I dun goofed, 6th it is.