I may be noob, but I can't kill many without skoria. With skoria I am ultimate reliant only in terms of sustain, so I can kill someone even without ultimate.
I am currently experimenting with SnB/SnB: 2x skoria, 5x shacklebreaker, 5x desert rose. Went well so far, but I can't decide if I didn't like more my old setup: 2x Skoria, 5x seducer, 5x BSW