I think that people are more extreme when they rate a source skill or a buff that costs 2AP. And this spell has both.
If it costs 2AP 1SP, it costs one attack (100% damage) + 1SP. It is hard to be profitable damage wise with this spell but it is not impossible.
EDIT : And a melee character will probably prefer using "Overpower" which has the exact same cost and which is really powerful.
Last edited by N0x; 30/10/17 02:55 PM.