Well, really. When I played with any of my shielders (pure hoplite, pure 1h, hybrid 1h/hoplite) I had valour in like 50% of times (I'm not kidding, there were times when I had x5 for hours in a row and quit the game having x5). If you try hard - it's easy to get valour, really easy, doesn't require a lot of skill. No need to buff it.