I think I found your math for calculating Light, but it's not working at 100% It seems to be: (Primary ATK + Secondary + Heavy) /3 (floored) + (Head DEF + Arms + Chest + Legs + Ghost Shell + Class Item)/6 (floored) Then Divide by 2 for light level. I'm not too happy about how this is affecting Class Items and Ghost Shells, though. For starters, the DEF values of Class Items is very... off. My House of Wolves Class Items are 30 Def or even 3, where my Crota's Items are 130. Also, the calculation above seems to not even register the Generalist Ghost's 3 Defense, so I have to put in as a 0 in my calculations even though I'm dividing by 6. In all honesty, you should probably remove defense from Ghosts and Class Items and change the Defense Calculation to divide by 4. While it does make sense for them to add to INT, STR, DIS and give special abilities, it doesn't make sense to tie them to Light. You really need for cosmetic Items to be mainly cosmetic, otherwise every one will wear the same ones... and no one will be happy they have to min/max even more.