I am curious on how that is achieved
It's "easily" achieved if you do 1 of 2 things: 1. Consume Mana and 2. Hold TP to effectively WS at 2.5k to 3k TP. More often than not you do not want to hit 99999 on RDM because you often lose WS frequency.
The only time I would hit capped damage on RDM on Aminon is if was about to WS around 1750-2k TP and I noticed an influx of actions at once and I needed to hold off and do an extra drain to ensure no wipe and I end up firing a WS from 2.5k+ It's not a good thing to do in all practicality purposes.
Since you were curious:
