so how speed works is the Number on your weapon is a % of speed you get.
So if your Hero's speed is 18 and your weapon is 150 speed they would do 150% of 18. So your speed would be 27.
If the weapons speed is 50, your combat speed would be 9.
Every 5 Dex is 1 speed.
Which then makes archers very fast
currently.
Different Hero's will be better in different seasons
(that is the goal at least)