| For the wizard one....why not make it dex instead of wisdom? Wisdom wizards get way too much love already, two of the at-wills rely on wisdom...NONE of the at-wills rely on dex or con. And the orb is already a very powerful implement.
Single target effects are more the domain of dex anyway (rays and such), so I would change this one to dex.
Also I agree the ranger at-will does not match twin strike. Here's the thing, FORGET about damaging at-wills for the ranger, twin strike has that niche in the bag...and any at-will that competes with it is just going to be overpowered. So I would focus on other possibilities for ranger at-wills. | 
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