90 agi with some modest % aspd boosts is fine for an RC build, as your rate caps out at 190 aspd (and that assumes you have perfect input + no lag.
With strings or a kiel card, that changes, but I'm assuming you're mostly not benefiting from aftercast delay.
You are right in that the build I posted is for PVE/PVM/leveling, but it can work in pvp, although it may not be optimal. You may want to drop luck for extra vit/dex if you plan to RC. If you plan to crit, you may want to drop dex and str for more agi/luk.
I have WoE'd with a build like the one I posted (less str, more vit and luk) and I found it wasn't very good, but that also depends a lot on your gear and if you want to go squishy-slashy or be more tanky. I'm not much on WoE/PVP tho, so my experience is somewhat limited and I have not invested a great deal of gear into it (no +12 ceb, for example). I typically didn't kill much (unless Dark Claw was up) and would rather spread poisons and break emps. Though getting a one-shot CRS on an unprepared ranger is always fun. Most the time I run around with a combat knife and shield.
If you want to go more tanky, you may opt for the WoE set, in which case using 90 as a stop point for the stats becomes less relevant -- and so you can drop 10 points here and there to balance out whatever you need.