and how about a automated process to create multisample instruments out of instruments that have long fx chains? (again to save power, pretty much sucks only being able to use about 70 vsts at once (lot less if big ones.)
I have to say that if you are using 70 plugins at once, you certainly must be doing something wrong. That's way too much stuff going on there. Let me tell you that as a rough rule of thumb, the more plugins you use, the worse your sound will get, not better.
I can think of only 3 reasons why you would be using 70 VSTs in a single track:
1. You don't want any one timbre to stand out, in the same way orchestral instruments blend together to form a single sound;
2. You don't know how to optimize your timbres to use as little FX as possible even for a lot of different timbres/instruments; OR
3. A lot of the VSTi's are used for "one shots" -- quick notes that only play a short sequence then aren't heard any more.
#1 is certainly legitimate, but i would suggest routing them thru a single plugin wrapper like Chainer to better control the sound and FX.
#2 means that you 're unaware of what your listener will hear when it's played. Except for VERY special effect, you don't need more than a 2 delay/reverb FX, and 2 flanging/chorusing FX (unless you're using different settings at different times in the track, in which case you can change those settings with PC notes or Zxx macros, which see), plus whatever instrument-specific VST FX you're applying. The human ear can only pick up a limited number of reverb and chorus levels. But i can't see how you can work up to SEVENTY VSTs even for a big track.
Concerning #3, if you're using a lot of oneshots, i would suggest transferring the notes to samples and use those instead of loading the plugin. It will save on load time and MAY reduce the overall memory footprint of the track, esp. if you call them more than once in the track.
You must have a helluva system to handle 70 all at once. I bet if a loaded 70 VSTs in a track, and called C-5 to activate all of them at once, i wonder if they'd lock up my 2 Ghz machine! 
well, im just playing, having fun making music, i havent studied much or tried to learn too much about the fiddly bits, i used to, back before vsts.
trying to get that sound.
i dunno, i dont add an vst, unless i think it makes the sound better, i make rather complex songs, with lots of layers and stuff, i havent tried chainer yet.
i also dont use that many "big" vst´s, and i havent yet made a song with a vsti (havent really found one yet that inspired me.)
my computer is a intel i7 3.4ghz (have been using middle of the line puters since i was 13, got a lucky break moneyvise and decided to get something that could really handle the vst load i wish to use.)
on transfering the single notes to wav, it would have to be a long wav, or a bunch of wavs, my melodies are rarely if ever, exactly the same over 2 patterns.
and im not really caring That much about what the Listener hears, either people like my stuff or not, i only can write to my pleasure and i have very good ears, quite above normal and i can easily pick apart many different melodies and hear the tiniest things and details.
though im always interested in learning something new.
i Have been overdoing the bass for some time. (personal opinion.

and im only just learning as i go, my songs are by no means perfect.
i do things the way i do, because i dont really see another alternative to getting the sounds i want, not a direct one, though i think im gonna try converting each instrument into a wav and then working on that in some other daw.
but, i dont add a vst unless i like at least some of what im hearing, over the previous sound.
you guys make good points though. worthy of consideration.
how i can use 70 effects at once?
well, i usually effect everything, unless i want a dry sound for it, and each effect might have a different effect.
filters, compressors, distortion and so on, and maybe all on one single instrument.
and then i might have 3-4 or more leads (if its a long song, short, maybe 2.)
2-3 basses (of varying frequncies.)
5-10 supporting instruments, a shitload of different single shot drums to make the beat or beats (or frills or whatever.)
then some fx and voices,vocals and whatnot.
usually 70-255 instruments, depending on song or length of it.
im still learning how to arrange and fit all that without it getting muddied. and i tend to overdo it.

2. You don't know how to optimize your timbres to use as little FX as possible even for a lot of different timbres/instruments;
could you give me some tips?

i often use old samples, even 8bit 8khz, if i like something about the sound, i try to bring it out with some vst´s, if you know a better way. (and ive used various audioeditors and whatnot throughout the years and i like the vst route better.)