- Figure out what niche you want your class to have
- Check if another class (or combination of two classes) could already fulfill the niche you're planning to provide
- Try not to step on the toes of another class too much
- Keep in mind which level a Core feat first appears in (Guardian shows up at 2, Swift Attack at 3, Fearless at 4, Fan the Hammer at 5)
- You don't always have to make it a 5-level class track, some classes only have 1-3 levels and/or require specific exaltations/races
- Full 5-level classes often have minor completion bonuses
- Base classes are a starting point, don't make them too powerful
- Recommended mandatory feats per level: 4-6
- Recommended total amount of feats per level: 6-8 (some of them have to be optional)
- Optional feats provide bonuses that would enhance/complement the class's playstyle or provide an alternate option.
- Recommended ratio of maximum Sword Schools and Gun Katas: 1:3, 2:2, 3:1
- Don't always take another homebrew as precedent, just because another class did something "rule-breaking" doesn't mean yours should as well
..........Examples: Warden gets Guardian at Level 1, Novice has 3 mandatory feats per level, Harbingers are divergent
- Some classes have special intended gimmicks/deliberate playstyles, try not to take it away from them
- Don't make new homebrew feats when an existing one could do, better if it's a core feat. Also, some actions can be abstracted with a skill test.
- Don't go overboard with complexity and bookkeeping, try to make new feats as complex/concise as necessary (hypocritical of me, I know)
- It's okay if your class has weaknesses in some areas, it can be compensated with multiclassing.
- On that note, don't make it easy for other class tracks to barge into yours if an important feat in an earlier level would be skipped.
- Some homebrew is left behind in
Zetaboards Tapatalk for a reason, don't bring it back.
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Don't be afraid to ask questions, seek community feedback, and gather suggestions. Me, Traskus and Scrap had to start from somewhere. My Warfighter was a total mess when it first came out.
As for in-field balance testing, well, that's why we run games (if ever). But if you have no other option then you could run solo games using a GM Emulator.