Kichikuou Rance:Parameters

Commander stats
Commanders have their own stats, their troop stats and their command abilities.

Commander stats (attack, defence and strikes) are used when calculating damage done in battles (and the chance of damage being done to them). Strikes is the maximum amount of attacks (and maximum potential damage) that a commander can do, most commanders have a relatively low number of strikes and will inflict 10 or less damage to enemy troops. They are mainly useful when attacking demons or when using "snipe" skills to damage commanders directly.

Troop attack/defence is the main indicator of how much damage a unit will do on the battlefield as most commanders do relatively low damage in battles (and depending on field size, may not even get to fight).

Command abilities are bonuses to the troop attack/defence depending on whether the unit is attacking, defending or in a dungeon. Rick for example, is best used in offensive battles while Cordoba works best when defending.

Magic is how much damage the unit and it's commander (if a mage) will do when attacking/defending with magic. Satella for example, does very low damage due to her low magic level, even though she has pretty high commander stats.

Everytime a commander levels, their strikes will increase by +1 and their command abilities may increase as well. This appears to be random, and you may not see a difference even after leveling a commander several times. This also means there is no real need to level most commanders as they won't improve much anyway (unless you are using the popularity staff).

Strategy chance is the odds of successfully implementing a strategy. Most commanders will only get +10 advantage when doing this, but some tacticians like Cream have a chance of gaining +50 advantage which makes your troops much stronger. Advantage seems to be a % boost to your troop effectiveness.

Skills
Most skills fall into two categories, "snipe" skills like rance attacks which target a commander directly, and "bomb" skills that cause damage to the whole unit. Snipe skills do 1-4 damage and bomb skills tend to do about 2x damage but seem quite inconsistent in damage. Gandhi has a special skill called "Evil Purging Overlord" that seems to do extra damage to monsters (i have gotten it to do 500-600+ against the very large monster units).