OK, just to clarify i understand you.
Firstly download bootstrap.dat torrent > Then Im not completely sure i understand this, 'use another instance of core to sync?' Do you mean using ./bitcoin-qt for example? And then allow Armory to rebuild/scan after after removing the broken blockchain dir data from Armory.
Thanks
I mean use a custom -datadir to sync that bootstrap off of another folder (instead of the default Core folder). I prefer people to have the old data and the fresh data available in case the bootstrap wasn't enough to defuse the issue. Gives me some room to poke around the problem.