How? Please enlighten me.
If you use tensor, you will get out of sneak, so, you will lose DC from measuring the foe.
So, Will you use tensor scroll 1st then sneak then wait for 5 sec & move to the mob then assassinate?
If you do that, the target might already be killed for most group situation.
Think why most rogues say 'scroll healing is not reliable source of healing on EE'. It's slow.
Don't forget tensor from scroll lasts for just 30 sec.
But, IMO, Dex builds doesn't offer much better DC & DPS than Int builds.
Just very similiar DC & DPS & save a feat. And most of all, it opens new build possibility