Maroon clownfish are probably the most aggressive of the clownfish. Even in a big tank like that I would hesitate because the maroon female will probably beat the punch out of the other clownfish .... whatever a picasso clown is I have no idea.
LFS give such random wierd names to fish it should be a crime and should be beat for that. It makes things difficult giving designer names.
I'm not saying that it hasnt been done - mixing clownfish species - but it's extra stress in a tank that would be better lived without and if you are going to comingle clown sp. Maroons are NOT a good one to start with.