Two points:
1)I fail to see how Lassitude is a miracle cure for bolster. Surely it'll take away the haste, but I found the worst part was always the 50% bonus to minimum damage. You'll still be eating that.
2) Someone mentioned the Bloodknight in the drachnid area. Ironically, it selfbuffs a 500ish atk buff (so much for drachnids not buffing). Once that is gone, it's as gimp as the rest of the zone.