Achieve sessionhost count in single run

For example:

_TargetSessionHostCount = 100
_TargetSessionHostBuffer = 50

1st run in 1st hour:
SHR run and 1st create extra 50 sessionhosts.
new _TargetSessionHostCount = 150

2nd run after n hour:
SHR run & deletes 50
new _TargetSessionHostCount = 100

it took 2 hours to get the target sessionhost counts.
This is because SHR is performing 1 activity at a time.

If possible if it can delete & create in same run, the target sessionhost count be in check in short time instead of waiting for it to run for 2 or 3 times (i.e. 2 hrs or 3 hrs) to achieve the target sessionhost count.