TheSmartGuy's Guide on Making Mesos

The cleric gets a crapload of exp from healing and the HP warrior can actually train without spending tons of cash of HP potions.

Love for the HP warrior! Although, having actually done this, I must warn you that the cleric might have to spend MP pots because MP eater is not being activated. (Also, I don't remember any situation when the HP warrior was killing anything? This may change with the leprechaun-whatever-it's-called situation.) If you can get a swarm of HP warriors it will be absolutely brilliant fantastic EXP for the cleric. .

I would see this primarily as an advantage of EXP for the cleric rather than saving money. HP warriors are a black hole as far as making money is concerned, although they're still my favourite and I couldn't play any other class... Not that they cost very much - just that they never give back!