What bizarre answers - VL2??
Surely VL3 (for instance) is a far better example of a "slur" study - yes there are a few ligado moments in 2 but that's really, really not what it's about.
Some others in vague order of difficulty:
- Op.60, nos. 8, 9 & 10
- Estudios del Ligado (in A and in Dm)
- Etudes Simples 9, 13 & 14 (both subtitled por los ligados
- Étude 10 (the Très animé
Something baroquey should fit the bill but my knowledge of pieces for the guitar is a bit thin in that area.
Slurs should be used with great care in Baroque music so as not to disrupt the weight and contour of the line. The Prelude from BWV1007 already suggested might fit the bill but be aware that many editions (by "names") put the slurs in the wrong places. The famous Canarios
of Sanz might suit you too - although the original was intended to be played almost entirely without slurs modern editions add plenty of them.
TheCardMaker wrote:I'm thinking very scalic rather than with much harmony, but with non stop slurs, but that isn't a crazy study
The studies above need not be played "crazy". A slower tempo can produce a very beautiful rendition - even of the Barrios.
There are plenty more from the classical/romantic era - check out collections by Giuliani and Carulli for easier examples.