1) I don't know, I don't recommend soloing. Maybe killing sh*t tons of cellar puks / opos in the mun tuy cellar for wind shards and 50sp/kill / 30 seconds? That's like 100sp/min --> 6000sp/hourish. Not bad for solo.
2) You can probably murder Arbor Squirrels if you find a good spot, but I'd recommend just ranking up a new class* and mass killing thistletail marmots near emerald valley.
you see guys, standing in the city /shouting for a group for 3-4 hours (OMG think of the old days FFXI) is a waste of time.
my server has 880 players, and 90% of the people i know left the game already, so either solo or quit, or wait for nov/dec update hoping to get sp problem fixed and some love to people that want to solo 2-3 hours a day and then do other things.
5k sp an hour isn't that great when you can get 10k+ sp in an efts grinding group. Even more an hour when everyone is within 5 ranks of each other. Sadly I feel solo grinding just is a big waste of time unless you can't find an efts grinding party. Then you just got to do what you got to do... solo. :(