do you use default algo switch time?
It seems that 90 sec is too low-half of the day it mines at "miner start and accelerates" rate.
I've been testing out sniffdog for the last few days and wondering the same thing.
On one hand, my brain says you should want the interval to be low so if / when a coin's difficulty and value line up to be the most profitable coin to mine at that current time ( for those minutes or seconds ) you want your miner to switch and mine that shit.
Then on the other hand, if the coins keep switching positions every 90 seconds, you are literally losing 10-20s of ramp up time for every 90s just from switching algos.
I dunno.... I've left it at 90s for now and am gonna let it run for another few days to take my daily earnings average over at least 5 days, and then i'll switch the interval to something longer and compare.