I have two fly boxes with nothing but Stimulators in a variety of colors/sizes that I keep stocked every season. I probably tie more of those than any other fly over the Winter as it is my most productive pattern. My favorite Stimmy for Brookies is Kaufmann's Royal Stimulator. Because many of the brookie streams I fish are deep in the woods where light is sometimes at a premium, I tie in some hot orange, bright yellow or bright white para post material on top of the deer hair wing for greater visibility in low light conditions. I also like to add rubber legs to mine (Baron- this is the warm-water version you need). Other favorite variations are the Crystal Stimmy, Black, Yellow (With the Yellow, try substituting black hackle and using black or orange/brown deer hair wing to mimic wasps). You really can't go wrong here, and yes, in the bigger sizes, the Stimmy is an excellent in a dry/dropper rig.