The description as per the wiki: When making a focused MSTRIKE or a two-weapon attack that slays the combatant's targeted creature foe, there is a chance to switch the remaining attacks to another foe in the room. This chance is 5% + 25% per rank.
I read this as at rank 3 I should have an 80% chance to use any remaining swings after killing one creature when another is present in the room. For the last few levels it just feels like that is not the case. It fires at a pretty good rate but no way is it 80%. Is it calculated differently than I am assuming? Maybe its 3 different 25% chances? More moc than 30 required for full effectiveness? Anyone else getting better results?
For reference I am using this ability on a level 41 elven warrior with 55 ranks moc (30 ranks required to use dervish) and rank 3 of dervish. Fully trained in twc using two morning stars.