How to change skill to finish Boss

Hi. Is there any script which will change skill to finish Boss?? I`m doing Piety/Dominus runs and loosing a lot of MF because my main skill doesn`t have IQQ IRR Linked in and i cant sacrifice dps during a fight to use these gems. For example i would like ( bot would :) ) to fight with boss using dual strike and then when boss is on its 5-10% life would like to use dual strike but with IRR IQQ linked to get more mf on the last hit.



Possible? or maybe there is one ??



Cheers

How to change skill to finish Boss