EDIT: after removing Modern Assault, Battlefield pack 2, Modern Weapons Pack, DayZ pack and Mill's Universal Ammo and Parts, Minecraft ed about another missing icon, for an R700, which I zeroed down to Angel Beats, removing it fixed the crash, but upon putting the other packs back in, i still have the old error.
EDIT: I found that both of xSparky's content packs (Angel Beats and Modern Weapons) are currently broken
MultiMC console
http://textdump.net/read/1545/
crash log
http://textdump.net/read/1546/
content packs
EDIT: after removing Modern Assault, Battlefield pack 2, Modern Weapons Pack, DayZ pack and Mill's Universal Ammo and Parts, Minecraft ed about another missing icon, for an R700, which I zeroed down to Angel Beats, removing it fixed the crash, but upon putting the other packs back in, i still have the old error.
EDIT: I found that both of xSparky's content packs (Angel Beats and Modern Weapons) are currently broken
Professional mincebag