In a real game of risk, the attacker throws first. The defender then looks at what they have to defeat - then throw their dice.
(I'd like to point out that: I'm not talking about defenders getting to chose how many they throw against the attacker... see below)
How about an option where the attacking dice show first - followed by a 1 second or so delay- before the defending dice are thrown.
I know this ones going to be poo pooed, but in a game of Risk the Dice are the exciting bit. Virtual slot machines show rotating wheels with the fruits on - when all they have to do is just show the finished result - but its the rotating wheels that add the will it / won't it excitment to playing slots on line (which I don't do btw)
I think that this site needs to seriously consider in the future some sort of pop up window that shows 3D dice being thrown into a green baize area to generate the sort of finger crossing shenanigans that come with that defending dice being thrown after the attackers thrown 2,4,5 etc.