In my opinion, he should have blown everyone but her up to generate more points with reverence through his clansmen and fear from her, only killing her right before the time limit was up.
@darknesspker I agree, he definitely could have squeezed more points out of everyone there by blowing them up one by one or as many as would have been safe enough to not get him killed.
Would have been better if they exploded one at a time with people watching, leaving the woman last, give her a little bit of hope, followed by despair. Missed opportunity for origin points but great conclusion nonetheless.