For fishing lakes with fathead minnows in them, I'd add a few weighted muddler minnows in various sizes and hues.

"Basic mayflys" seems like an oxymoron--fish can be quite particular as to what they shove down their throat. I've had luck with a #16 olive paradun when a #16 grey paradun wouldn't do the trick...would suggest tying up paraduns in #12-#18 in black, grey, olive,and brown to match the majority of Western WA lake mayflies...

ANTS. Look for ants to swarm here in the next couple of weeks--probably once we get a couple real warm days. Tie some big carpenter ants--I'm yet to find ones in the store that are large enough. Most of mine are #10, bodies about 3/4 of an inch long and wings 1/2 to 3/4 of an inch long...with a black abdomen ribbed with a single strand of crystal flash and covered with black deer hair ("humpy" style), a pair of longish blue dun hackle tips for wings, black hackle, a thorax about 1/3 the length of the abdomen and again covered with black deer hair, a couple more turns of black hackle, and a smallish head.

Good fishing!