that's good advice, with a few corrections:
Aspd does effect the speed at which you DS, so make sure you have enough INT for a decent DS speed, maybe 180-185 aspd.
then like kerners suggested, get your dex to 80, then IC, then add 1 dex at a time untill you get close to a multiple of 10, then IC again, untill you IC and it equals an even multiple of 10 (for example, 84+36 DEX with IC)
In your case, i think INT can be neglected. The reason you add INT is for a larger bar of SP for doublestrafing. In your case, you dont have many extra stats to spare, so if i were you, i'd go all DEX/AGI. There's definately a point where more INT is better, i just dont know how to figure it out. You have to figure that additional DEX = higher damage, but more INT = More doublestrafes, which means more total damage. The INT, however, can be substituted by frequent GJ spamming in order to replenish SP bars.
Also, kerners suggested ankle snaring MVPs...this is utterly useless if you're using the DS technique. I've only snared 2 MVP's before, and it's because I use a different strategy for those. Most of your MVP's, however, need to be diagonal DS'ed, not snared.