I fly sparge very slowly, this last 11 gallon batch (14 gallons of wort) took about 2.5 hours of sparge time and I exceeded my preboil numbers. It also gives me time to clean and sanitize all my equipment without being rushed.
I hope you're not putting me in the experienced brewer category. But yeah that's what I do with a lot of my beers and they come out fine.
Personally? I'd absolutely no sparge, just keep track and note what efficiency hit you take and compensate for it. I no sparge my 5 gallon batches and batch sparge my 10 gallon batches due to volume limitations in my mash tun. You could run a test with both methods and see what the difference is, decide if the extra work of heating a second batch of water, etc.. is worth it to you. I just prefer to save myself the half hour. It's a time vs efficiency thing really, my time to me is worth more than a 2% efficiency difference.
Sparging takes no extra time for me really i start heating my sparge volume when im on my last mash rest then whilst the wort is heating to boil i sparge. The boil never beats me.
