Let's see for my Loremaster I'd usually have the following (a 3.5 character), sticking to the PHB (outside of Elminster's Evasion) and going off 8+ yr old memories. There's a number of other spells around that either aren't arcane or didn't exist when he was an active character.
Permanency - Arcane Sight, See Invisibility, Darkvision
Telepathic Bond (permanent with one other individual) also via Permanency
Greater Magic Weapon (available) - in case a weird special material or weapon was ever needed to bypass some equally weird DR etc.
Detect Scrying - probably the first one on this list to get 24-7 usage.
Mages Private Sanctum (available) +/- Secure Shelter
(or Mages Magnificent Mansion) - rapid total protection from scrying and other magical spying for however many folks can fit within the Shelter.
Prying Eyes (or Greater Prying Eyes)
Contingency (typically linked to Teleport/command word to a 'safe' location upon being triggered), later Elminster's Evasion
Moment of Prescience, usually a second one available to be recast if used.
Depending on circumstances:
(Extended) Protection from "Energy" (of whatever I expected to go up against)
False Vision and/or Screen
(Extended) Prismatic Sphere
He also typically had a Limited Wish memorized plus access to one or more Limited Wishes on scrolls for quick access to just about any spell of the proper levels (for use with Limited Wish) that he had ever seen or heard of and he suddenly found it required.