Koffing's got base 95 defense. That's pretty good for little cup, at least from my knowledge. Maybe you should include pre-evolution corner. Smogon suggest that it's best running Resttalk/Will-o-Wisp/Clear Smog, but hey, what do I know about LC? Physically defensive with eviolite, obviously. Could probably work in NU as well, but that's Weezing's job.That's Koffing. Just saying.Weezig, the Icon pokemon of Smogon,You still have to admit that Abra has 100+ special attack and psychic STAB.Even Abra is a threat to the poison cloud.
I still do agree with you though. If you use Weezing, use it for it's defense stat.