Im a fan of No1 post and the No4 post and crosshair. I find them both to be very fast and work well in dim light without any need for a lighting option. Years ago I saw a "Command Post" that let you flip the post from the traditional bottom (pointing up position) to the top (pointing down). What a great idea! In the military I used the Leatherwood ART scope (traditional duplex) with two "extra" horizontal lines. You adjusted the power of the scope to bracket the enemy's belt and top of his head. The power changing also used a cam to raise or lower the scope to automatically adjuist for range. It was an amazing concept. There was zero need to calculate range by dot size. It was NOT fast for quick shots but since it was for sniping that wasnt a concern. I have a scope with a Christmas Tree reticle. It "looks" cool but its also NOT fast. Yest it helps with ranging and hold over; but it can be confusing when you need a fast shot.