T2 VNMs have some of the worst competition in abyssea currently. The most congestion seems to occur on Heroes VNMs mainly T2s, Koios, Gamayun, and Chione.
There are types of people that farm these, players trying to get Colorless Souls for Ochain who need many many kills and there is the more common people trying to kill these for body seals. This creates a lot of competition to even claim one of these VNMs at times.
I made the following suggestions before but really have not seen anything come out of it
Suggestions
1. I would add 3 copies of the Tier 2 / 3 VNM to each abyssea Zone, in order to help with congestion.
2. I would change it so that if you get a Red !! on a VNM it will then 100% upgrade your abyssite to the next level.