Nick,
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It's been my experience that the blood dot is just another enhancement to a pretty good pattern already. I keep both in my fly box and have caught fish with and without the dot. I guess I would simply say it doesn't hurt to have a variety of egg patterns in different colors, with and without dots, just in case that's what they want to see. Besides, it gives you a little more time on the vise to improve your skill and speed.
Joe
Joe Valencic
Life Member FFF
Rod Builder in Chains