you get a sp reset with your jobchange at lvl 18.
only other way is a cashshop item.
priestpatch was in august, and the sp reset we were all hoping for didnt come, neither did it with the witch patch nor with the female gunner patch.
it is said, that u can obtain an sp reset via events, but that i cant confirm. next chance for nexon to be nice: christmas >.<
about a rank: juggle your enemies to build up style. just hit them in midair with jackspike/malin rose and shoot them or bbq --> gattling, lets u get 85p style easily. for tech, go for overkills, counters, backattacks (all are pretty hard to get at your lvl)