My three sims are still pretty much Flypaper 3.2 and veggies. Flypaper mutates whereas nasty plant does not, so it has managed to mutate to become better at coexisting with NP and in fact, knock it all the way down in sims with long day/night cycles to the point where beniegn veggies get repopulated. I designed it to combat NP. Law of large numbers, lots of ties NP can't defeat in a single cycle and small, so shots miss.
FYI, nasty plant is really just LionFish 3 as a veggy.
Note that more than one tie can form per cycle, so *.tiepres .deltie store will miss some occasionally, for a cycle or two, which is long enough for FP to retie....
I see a Necrophagus come through every once in a while but they haven't taken hold as yet.
Glad you like IM. It's only the beginning.