update: Automatic EXP scaling

[pacampbell]

Tweak automatic EXP based on real world data.

[hankhotspur]

The proposed changes to exp scaling are unfortunately very punishing for players. Season 2 introduced a very simple formula:

• Regular enemies: EXP_UNTIL_NEXT_LV/1000
• Bosses: EXP_UNTIL_NEXT_LV/200

This formula checks out against many known data points.

• Level 60: 756XP (EXP_UNTIL_NEXT_LV: 756600)
• Level 65: 788XP (EXP_UNTIL_NEXT_LV: 788100)
• Level 70: 1535XP (EXP_UNTIL_NEXT_LV: 1535000)
• Level 75: 2735XP (EXP_UNTIL_NEXT_LV: 2735000)
• Level 80: 4200XP (EXP_UNTIL_NEXT_LV: 4200000)

The new automatic formula would give us these values instead:

• Level 60: 230XP (EXP_UNTIL_NEXT_LV: 756600)
• Level 65: 247XP (EXP_UNTIL_NEXT_LV: 788100)
• Level 70: 265XP (EXP_UNTIL_NEXT_LV: 1535000)
• Level 75: 283XP (EXP_UNTIL_NEXT_LV: 2735000)
• Level 80: 300XP (EXP_UNTIL_NEXT_LV: 4200000)

Our formula should be able to reach as many of the original values as possible without punishing Season 1 experience gains. I would suggest we work our way to Phindym (lv70) and then switch to Capcom's formula.

[pacampbell]

This is why I didn't merge it yet. It's a work in progress. I was trying to collect more S3 info, combined with this info. Using S2 formula alone for S1 also falls apart but I think the S1 formula is kinda clear as well.