Joe
I know of some who deviate from the "standard" of 1:150 ie 7ml to every litre. Some go to 1:80 depending on soiling but 1:100 seems popular, maybe because it is 10ml per litre.
Nemesis, like M-Power, needs water to be able to work well, so too strong may seem to be a negative.
Having said that I think the info for Nemesis refers to spotters at 1:20
As you will be aware, dwell time is important with Nemesis and M-Power - 15 minute
I prespray, agitate and then the dwell.