Other than how much they seemed to miss before, the THM/CON TP attacks had at least some function prior to this patch.
As you know, prior to this patch, wands had a damage type composed of three elements. Now, all the elements are gone and it's just blunt damage. It seems all of these attacks- phantom dart and shadowfall(whose damage type are tied to the damage type of your weapon), and all THM/CON TP attacks have been nerfed into oblivion because of this change. I'm rank 33 and it still takes multiple hits to kill a level 1 rat where before, any attack be it phantom dart, a spell or flashfreeze or anything would one-shot them. Now all these attacks seem to be the equivalent of Stone Throw.

Was this intentional or an unintended side effect of the patch changes? as it is now all these attacks may as well be removed as they are beyond useless. Though I'd rather them be restored to their previous funcitonality.