i mostly do the mater quest at lvl 71.. sometimes i just go on playing until lvl 75.. but i didnt really find a lot useful things that way.. i am still killing very quick until lvl 75.. from lvl 75 to lvl 85 it gets harder.. and at lvl 85+ soloing it is getting pretty hairy ^^ not talking about lvl 95+
if you like playing such high lvls and you get to lvl 101 you get an additional guild point.
but to do magic find.. i would just do normal climbs to lvl 71 and pick up all lvl 15+ or 20+ wellables and do them either solo or when you got the chance to do it..
about magic luck gear: nobody really knows how helpful it is to use magic luck.. i welled with 42 magic luck (including glyphs) for a while.. but it didnt really give me a lot of finds.. maybe i will give it another try in the future.