^^ Your chart is wrong, sorry buddy. I just replied to you in another thread where you listed this chart which you just made up yourself.
Clonazepam is absolutely NOT 2x more potent than alprazolam. They are equipotent, meaning 1 mg clonaz = 1 mg alpraz (which both equal 10 mg diazepam). In fact, alprazolam is very very (and I mean very, very) slightly more potent - though the difference is negligable. That is by weight (mg for mg).
As far as power and strength, you are wrong again. Clonazepam is NOT AT ALL "much stronger" than alprazolam. Alprazolam is a more powerful sedative at equal doses, while clonazepam is a slightly stronger anxiolytic at equal doses. They are more or less, equal. Of all the anxiolytic benzos, these two are likely the strongest anxiolytics (though bromazepam can give both a run for their money, despite it being less potent by weight - remember though, potency means nothing, its the strength of the actual drug).
The hypnotics (triazolam, nitrazepam, flunitrazepam, temazepam, midazolam, flurazepam, flutoprazepam, nimetazepam, and brotizolam) are all more powerful than alpraz, clonaz, and all other anxiolytic benzos - be it for sedation, anxiety relief, anticonvulsive action, etc. These are the "Corleone family" within the families of benzos.