You should consider p2pool instead of solo. Your traffic stays local like solo, but your variance is decreased like it would be on a pool.
Come on Diablo, with 8 Th/s, variance is a non-issue. They mine 500+ blocks per month on average. They have more chances of being hit by thunder 10 times than to mine zero blocks during a specific month and being unable to cover their monthly expenditures.
p2pool leads to a higher orphan rate than solo mining.
Solo mining is
obviously the best choice with 8 Th/s.