Pure bolter profs with two Imp cards actually managed to 1hko (or almost) my 99/70 Paladin with 2 S.rosaries, VIT 99, lv10 Endure, and Valk shield. (I listed out eqs because I forgot my MDEF)
Wait, I forgot whether it included Doublecast, but w/e.
Bolter profs are easy to counter though. Medusa card + either Pasana, Swordfish, or Dokebi armour makes them cry =/ When that happens they'll just Web + Dispel and ignore you.