5, I got the seeds in a trade, I'm not a good judge of potency as I have a low tolerance for THC (I get high really easily). I grew it for the anti depressant/anxiety/restless leg syndrome properties not the high.
Best Sativa was Blaze (Blueberry X Haze). I've crossed it to Satori but not grown it out yet.
I smoked some unknown Kush a couple of days ago that was the most potent weed I've smoked to date, but it's not my cup-of-tea I'm a sativa man.
(PS I'm offline and posting from a library computer with a limited time online)