Ahhhh, complex hatches...
...another way to say WTF!!!
Or an excuse for getting skunked!
When the hatch is compound, such as when different trout are taking different life stages of the same insect; I prefer Bourbon.
When the hatch is complex, such as when different trout are taking different insects; I prefer Scotch.
When the hatch is compound and complex, such as when different trout are taking different life stages of the same insects and other more aggravating trout are taking different insects just to piss me off; I prefer to throw rocks at them or watch old Flintstones cartoons at home.
When I have no Bourbon or Scotch, rocks are scarce and the only cartoon on TV is Sponge Bob; I will try and match what I THINK the fish are on, based on what I see and the rise form. This is usually a trial and error process with emphasis on the error.
The fun part is all of the revelations I have in the process when I
know I have it figured out, only to be humbled by a 10" rainbow laughing its ass off at what I thought would work. Other tricks I have up my sleeve are something larger, something smaller, a totally wacky choice like a Woolly Bugger or the "right" fly on a lighter tippet.
What usually happens is I forget all of that crap and I remind myself that I am the superior intellect in the battle. I am at the top of the food chain for a reason and could eat that SOB trout...
...if I could only catch it!
After I convince myself, I make constant adjustments to my presentation with whatever fly I am using while trying to eliminate drag as much as possible by casting in different directions, changing position, tweaking my leader or targeting fish in downstream lies.
If that doesn't work, I'll fish until dark in the hopes that the moron fish will will come out to play when their eyesight and mine is impaired.
Sometimes that works better than anything, including Bourbon!