I've already said he's the best captain in psl, I don't disagree.
It's just the reason I don't rate psl as a metric is primarily because unlike international that features the best players and difficult pitches, psl, ipl or any league features alot of 2nd and 3rd string players alongside 1st string and pitches are deliberately made to be batting friendly because franchise has money in it and fans want to see some sixes and entertainment.
In terms of captaincy, every year it changes, at one point sarfraz was the best captain in psl for quetta and now he's washed up, one or 2 years back it was shaheen who was the best and his t20 captaincy stint hasn't been the best. Rizzu in this psl is the best.
Psl isn't consistent, as sheddy is a psl star. Rizzu is best this year and next year it may change and the year after that.
It's not like any psl captain has ever been a MS Dhoni or pointing showcasing consistent captaincy over the years.
But yes this year rizzu is the best. Hopefully he continues and becomes consistent like the other 2.