[Sojik]

No you don't have to edit oUF. It supports custom show conditionals à la macros.

For example the header spawn would work something like this:

    party = self:SpawnHeader('oUF_Party',nil,'custom [group:party,nogroup:raid][@raid6,noexists,group:raid] show;hide',
        'showParty',true,
        'point','TOP',
        'xOffset',0,
        'yOffset',-4)

and

for i = 1,5 do
        local raid = self:SpawnHeader('oUF_Raid'..i,nil,'raid10',
            'groupFilter',tostring(i),
            'showRaid',true,
            'point','RIGHT',
            'xoffset',-4,
            'yOffset',0)
end