User blog:Undead.exe/Cosplay Stat Patterns

Rarity	ATK +20 / MP +5	+20 (Sep 2015?)	+50 / -20 (Oct 2016?)	Escalating	Bonus (Jan 2019)
6*	-	-	-	+50 / -20	+60 / -30
7*	-	-	-	+50 / -20	+60 / -30
8*	-	-	-	+60 / -30	+70 / -40
9*	-	-	-	+70 / -40	+80 / -50 +100 / -70
9+	N/A	N/A	HP +65 HP +4% HP +5% / MP - 1% ATK +2% ATK +3% / DEF -1% DEF + 120 DEF + 2%	+60 +30 / Burst Stock +1
10*	ATK +100 / MP +10	+60	+140 / -80	+160 / -90	+180 / -100 +200 / -120

Additional Notes

• The most recent gacha stats (as of January 2019) appear to use the "Escalating" stats as the base stat pattern, various gacha pieces in one of the sets getting varying levels of additional bonuses as seen in the "Bonus" column above
• For gacha pieces below 10*, the penalty is generally equivalent to (Weighted Bonuses - 30)
• For 10* pieces, the penalty generally appears to be [(Weighted Bonuses + 20) x 0.5], with the [+200 / -120] combination being an exception
• Pure Crit Mult gacha pieces tend to have much more extreme scaling than other stats, with 6* and 7* pieces only getting +0.1 (roughly the equivalent of +20 to most other stats) and 8* pieces getting +0.2 (approximately +40 to most other stats)
• Additionally, Crit Mult gacha pieces may deviate slightly in terms of penalties at upper rarities (slightly lower equivalent penalties occasionally observed at equivalents of +80 / -40 for 9* and +200 /.-100 for 10* pieces)
• ATK penalties seem to generally be 10 higher than their STR/VIT/DEX/AGI/INT/MND equivalents for rarities below 10*
• Cast Speed and Def Mult bonuses appear to be treated as if they're worth 25-30 points from recent gacha sets