I'm with mega dave on this,
I would love to see a video on this. I mean, I have yet to try it out, but I am doing a death metal band in 2 weeks and would really like to get that sound. Not because I'm into it, but because I know that's what they want, and no one around here can produce that sound.
i'm very familiar with death metal....i'd say it all comes down to the player.
with a good player, you'll likely want to take it section by section....any more and the tuning might turn out strange, and you'll (more importantly) loose the feel of the part.
with a bad player, i tend to have him still play the section over and over and comp the best takes together. on the parts where it's still sketchy, punch in.
with a REAL bad player, lick by lick, maybe comp together.
for solos, either lick by lick (bad player), or (once again) a couple of takes and comp together.
anything that still doesn't live up to so called modern standards, editing on the DIs will do just fine.
it's obviously very dependent on the exactly dm subgenre...old school dm like grave etc will need less perfection like tech death metal....i'm mainly refering to the latter with abovementioned remarks.
ok, just as a disclaimer, with a real good player you obviously won't need much of that stuff....however, i have a feeling that especially in tech dm many people tend to write well over their abilities....unfortuntately
it would save me a lot of grief if it was otherwise, seeing how i do mostly death metal ^^