Just comparing the skillchain multipliers what I found empirically for MB bonuses as one might assume they should match up 1:1 except the skillchain type will reduce the skillchain multiplier rank apparently. (note that the actual magic damage bonus from magic bursts was not addressed specifically...)
Recall the range of skill chain multipliers from highest rank of resistance to lowest rank of resistance:
Code:
5% | 10% | 15% | 20% | 25% | 30% | 40% | 50% | 60% | 70% | 85% | 100% | 115% | 130% | 150%
For example for Metalcruncher Worm the multipliers in the text file are:
Code:
Liquefaction (fire) 130%
Detonation (wind) 150%
Impaction (lightning) 150%
Transfixion (light) 150%
Induration (ice) 130%
Scission (earth) 70%
Reverberation (water) 130%
Compression (dark) 100%
I ended up with the following (approximate, as there are rounding errors due to flooring I suppose) MB bonuses where you add the value to 1.35:
Code:
Liquefaction (fire) 1.5
Detonation (wind) 1.5
Impaction (lightning) 1.5
Transfixion (light) (not observed)
Induration (ice) 1.5
Scission (earth) 0.4
Reverberation (water) 1.5
Compression (dark) 0.85
Since a skill chain is supposed to reduce the skillchain resistance rank by 1, it would make sense that the corresponding MB bonus would match from whatever skillchain I actually did (whether level 1 or level 2 since I used Immanence). However it doesn't explain earth damage and dark damage so perhaps skillchain resistances and magic burst resistances should not be considered the same especially when I discovered situations where there is no magic burst bonus (0%) applied.