Yeah I bet it would take forever lol, slow low dmg melee physical and one holy light skil spam with constant spam on self heals. The pot cost would outweigh the utility of it lol. Would be interesting if anyone tried though.
Using hammer will cut the expense for pots. Not to mention even a knight will still be on the same mobs probably till 48 so the only difference with a BP would be that it can't mob which will make the kill slower but with 37+ armor equips and angelus. Normal mobs till exit won't be hitting a BP for more than 100 or so depending and the heal for a BP is usually at 500+ for a level 6 heal. Kill speed isn't really slow, I was able to share some spot with knights and I was able to finish up one mob faster than them and heal every 2 or 3 mobs or depends if I get mobbed which will cause spam of heals lol.