"good old Vancian".... I call that an oxymoron and the first subsystem anyone changed in AD&D.
OTOH this is all obviated if you also use the idea of augments. In that case every power could be in all three flavors and you just spend 'vitality' to achieve the level of effect you desire.
I remember something about that one, so it must have been Mizirian the Magician, lesser or greater spells, he could manage 6 of the former or 4 of the latter, IIRC.WELL, remember, the ACTUAL magic system of The Dying Earth is NOT the D&D magic system. Vance never talked about 'levels' or anything like that. While there was a passage somewhere that hinted that some spells might be more difficult to memorize, there wasn't any statement that this resulted in a decrease in overall number of spells.
Nod. Magic being dangerous to the caster rarely creeps into D&D.Each wizard first of all knew certain spells, and they generally didn't share willingly. Secondly each one varied in his ability to memorize. Some could hold but one or two spells in memory, others a dozen. It is equally likely it just meant some were out of the grasp of lesser casters, or they might miscast them (a distinct danger in his stories).
1-4 dailies plus a few daily utilities is a lot closer to the number of spells Vance's magicians could memorize, and they didn't seem to memorize the same one two or more times like D&D wizards often would. OTOH, at-wills seem right out.4e wizards are actually not a BAD model of Vancian wizards.
Or magic items. Or items of ancient technology. Or cultivate magical plants, for that matter.I don't recall any at-will powers that Vance described, but many wizards did have captive magical beings that could perform certain magical tasks for them on command.
Also memorizing a few 'easy' spells each encounter doesn't seem like a huge deviation compared to memorizing dozens like a high-level magic-user.Beyond that wizards tended to spend some time memorizing a selected list of spells, but its not clear that all of them required the same time, so you COULD consider encounter powers to be the 'easier' spells. I don't think it emulates Vance more accurately than the classic D&D magic system, but maybe not really WORSE either.
In any event what a wonderful thread about improving Martial Practices this has become /sarcasm
so you can spend a couple minutes getting good and ready, and then leap 200' across a chasm.
At some level having more elaborate skill definitions that talk about what you can accomplish with more protracted use or with better tools can cover some of what MP seem to be doing currently.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.