I have a hard time making a mage character without resources E. None of the those I have made or played started with a focus. Current character is Sum to 10 Magic A, Skills A, Attributes C, Meta E, Res E. Background is that he is old (aged quality, low low phys stats), down on his luck (low lifestyle, takes the bus, no foci, minimal surveillance gear). I wanted a full load of magic skills (6 in sorcery group, 6's with specs in all three conjuring skills, 6 in Astral Combat, perception, assensing, plus good dicepools for sneak, interrogation, negotiation (diplomacy), tracking (for tailing), Con (fast talk) and disguise. Loads of dice pool 10 and 12 knowledge skills.
So you might say I'm munchkining with AACEE, but the backstory makes sense. I play him as old and frail, but wise and subtle with spells. Different people prioritize different things. I like lots of high level skills. My dump stats (all four) make sense for this character.
If I were playing missions, I probably wouldn't build this way. Missions is a grinder. Home games usually are about character and story. Probably go Magic A, Skills B, Attr C, Res D, Meta E. Dumb Cha and Log instead of Body and Agil.