The people asking for 500 potency moves need to understand how absurd that will be. Let's take Tornado Kick for example. It does like what....330 potency? Now, take that base potency and add in all possible buffs(except bfb since that isn't always going to be up)

+30% damage from GL3
+10% damage from TWS
+10% damage from DK(considering TK is blunt, it pretty much benefits)

So basically 50% extra damage. Adding that in with TK's base potency, you'll have 495, which is basically almost your desired 500 potency. To give you a little insight on how much damage that is around(at i190+ or so) you're seeing 2-3k non crit.

Now, if we had it at 500 base potency, the total potency with the above buffs factored would be as alarmingly high as 750. Feel free to try to imagine the damage.