I'm just checking to see if I'm reading this right, but could you potentially switch 4 red die on a CR90 (since there's no "once per round" or "exhaust" on the card)? Yes, you'd have lost your tokens, but +8 damage at long range seems kinda nuts.
i'm just thinking of double arc CR90's at 51 pts each delivering said payload and then just running away for the rest of the game (or ramming things, depending on your mood and MoV concerns)