You can cut composite deck boards with a standard miter saw blade, but you'll have an easier time if you follow the manufacturer's guidelines. Trex specifically recommends the Diablo TrexBlade.
Aspect Of Encircling Blades can only be used by the Rogue class. In Diablo 4, the strength of affixes are randomly generated within a range of values. This is shown in [parenthesis] in tooltip above.