What kind of weeds are you targeting?
I have had real good luck with this produce on dandelions and lots of spring weeds but I noticed that it didn't put the big hit on the clover that I wanted. I will probably try a sticker in the fall and next spring. I used it at full strength and I did have overlap also and it wasn't a problem in the spring. But we did have a bit of rain and cool temps. BTW I have the same grass types that you do.
So I guess my answer to you is try both but wait until fall. If you can get by without a sticker then that is the preferred way but if you need to use it because of your target weed then try going to 3/4 strength.
Heat helps with absorption and translocation, if you spray in the heat you have a great chance of putting the hurt on friend and foe alike. This product doesn't work very fast in the cooler weather but it does work and it is made to spray when cooler.
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