Disgaea 2: Cursed Memories/Hospital prizes

Table of Prizes
The hospital dulls out its prizes based on the amount of HP and SP healed, and the number of full resurrections:

Potions
{|

Artifacts
! Prize !! HP Recovered !! SP Recovered !! Resurrections
 * Imperial Seal  ||      800     ||      400     ||        5
 * Dark Rosary    ||     3000     ||     1500     ||       15
 * Devil Ring     ||     10000    ||     5000     ||       40
 * Feather Token  ||     30000    ||     15000    ||       70
 * Sophia's Mirror ||    80000    ||     40000    ||      110
 * Pravda Pendant ||    200000    ||    100000    ||      160
 * Royal Ring     ||    500000    ||    250000    ||      220
 * Testament      ||    980000    ||    490000    ||      300
 * }
 * Sophia's Mirror ||    80000    ||     40000    ||      110
 * Pravda Pendant ||    200000    ||    100000    ||      160
 * Royal Ring     ||    500000    ||    250000    ||      220
 * Testament      ||    980000    ||    490000    ||      300
 * }
 * Testament      ||    980000    ||    490000    ||      300
 * }
 * }
 * }

During typical (non-exploitative) gameplay it is the resurrections that usually lag behind the rest. If you play turn-based strategies like I do, then you'll most likely find yourself with a World or Star Muscle, but only having obtained Sophia's Mirror or the Pravda Pendant simply because your party's too good at not getting themselves killed off. If this is the case, then go ahead and go on a bit of a killing spree on the next couple maps so you can get yourself those long-awaited and well-deserved high-end artifacts (and the generally worthless potions too!).

Due to the nature of the Hospital rewards, Disgaea 2 is a game best played with lots of expendable characters as part of your basic strategy. Don't be afraid to lose a couple characters per map. This is especially true in the Item World, where you can pull out a fresh set of 10 combatants on every level, regardless of how many just died on the previous level. Not only will this net you the better items from the Hospital sooner, it'll also allow you to fight deeper into Item world by conserving the HP/SP of your strongest characters for the later levels and Item Bosses, which in itself results in stronger items and faster overall progression.

Exploiting the Hospital
Every time you leave and re-enter the Prizes screen, the items are re-generated. What this means is that you can keep leaving and re-entering until you get a Rare item, and it usually only takes between a handful of seconds (at best) or just over a minute (at the very worst) to have your new prize come up as Rare -- netting you both better stats and better resale value. Note that the hospital never gives out legendary items. Rare items are as good as it gets.

The hospital can be by far the cheapest and quickest way to obtain some of the most useful items in the game. The best time to take advantage of the hospital is during Chapter 1, since all hospital costs are offered at a 50% discount. Hospital prices are normal for Chapter 2, and increase in 10% increments for each additional chapter. During Chapter 1 it is possible to obtain all items for approximately 650k total costs, while the same achievement in Chapter 6 costs about 1.3 mil HL.

If you really feel like abusing the system, make a bunch of Prinnies. You can kill them just by throwing. Better yet, it always takes 1 HL to heal them, even if they're dead. ONE. TINY. HELL. You'll easily be able to obtain every hospital item without even spending 0.1 million (maybe not even 1k, if the Prinnies have enough HP and SP).