DALK:Job System

Classes in DALK are acquired by leveling only unlike it's sequel.

Seiru being the only exemption as the game needs to be beaten for him to be able to change classes

Everyone starts of as an Ordinary Person, except Seiru who's a Trainee Monk.

Seiru
Seiru starts out as a Trainee Monk and after beating the game gets upgraded to a priest. After reaching level 41 he can then switch to either Great Priest or Warrior Priest. Both are fine, but for later exploration you'll probably prefer the Great Priest's more powerful heal as a dead Seiru means game-over.

Fighter
The girls can reach fighter at LV4, this class spits into either Valkyrie (LV 26 or トーロード (LV 31). Valkyries are full on offense having basically 0 defense and magic resistance, they do have good HP growth though. トーロード are more middling, foregoing the all or nothing approach and having just good attack with some decent defense and HP. As a bonus they do get a +1 magic move and some decent magic stats.

Knight
Knights (LV5) only grow into Paladins (LV26).

Paladins are decent fighters with strong physical defence and some magic resistance.

Kenpo
This is the martial arts line. You start with Kenpouka (LV4) on to Kentoushi (LV26) and finally Toukishi (LV51). This line focus on hitting hard and thus increases the chance of crits, the final stage should give you an increase in range too.

Archer
Archers are the dedicated ranged class. The line consists out of the starting Archer (LV4) and Sniper (LV26). It should be ranged physical damage, but you do get a +4 range attack as a sniper.

Magic User
A line focused completely on Magic. You start out as a Magic User (LV5), then Witch (LV26) and finally Minerva (LV43).

In a way this is similar to the archer line, except it's magic which will come in handy against foes with high physical defence.

DALK
This class requires you to become a Bard first. Bard is the first class change anyone can take at LV2, but isn't that good. It has a special ability which allows you to grant someone a turn though. However if you tough it out to LV31, you'll be rewarded by the DALK Goddess and she'll allow you to change class to DALK. The class itself is kind of good at everything and even gets a magical attack making it quite versatile. As a bonus you get an analyze ability which allows you to check a few stats of an enemy. Because of this it's sort of the best class in the game, but it doesn't excel at things like the others do. Therefore a varied party is always recommended.

Thief
Thieves (LV3) and Assasins (LV21) are more of a utility than a good class. They are fast, get high evasion and level quickly, but they weak. They have good points though, both of these classes increase treasure and item discovery rate allowing you to get more items with than normal. They can also equip the Whip which gives them +1 range which means they can do some relatively safe additional damage.

Table
This table quickly lists the classes, needed LV and direct stat changes upon class change.