I don't see why you'd use Kaahi, it's more expensive to waste GJs when you can get yourself a Hell Poodle Necklace or something and use Meat which only costs 41 zenny.
Using 100-200 GJ over the course of 2-3 hours is expensive ?_?
Critical wounds which procs quite often, even encountering a crawler and being hit once usually gives it to you, reduces healing and healing items 60%. Even an 4100 heal only heals 1640. Kaahi remains constant 1400 or whichever setting you desire.
Meats will heal you what, 600 with a hell poodle at the average Star Gladiator vit rate? That'll be reduced to 240 each.
Your best route is having a High Priest with Safety Wall tag along, and its usually not worth extensive farming without High Priest assist because you risk losing Miracle to a surprise mob.
Like Miss All Sunday said, having party members [even if they're just dead ones] tag along can give you quite the damage boost. Its like having miracle mode, in miracle mode.