For fast roll use gold hemmed set and for mid roll use +0 elite knight set.
You can use a +0 drake sword and +5 uchigatana with a +5 knight shield. Non ascended pyro glove +0-5 (because pyromancy is op right?)
You can invade in where noobs go around most like parish and sens fortress. Maybe even anor londo, although you may find some actual normal players there. For Sens/Anor Londo you may increase your level to 30-35/40-45 and perhaps swap one of the fireballs with power within.
Well the only problem is gonna be defeating 4 kings with such low level and gear. Welp I guess do what all the noobs do and R1 spam your way to victory!