It's all achievable BUT your grid isn't setup evenly whereas Card Dance and Card Wipe both require an even grid.
Another option is to use Expressions but unless you're comfortable with that, it's going to be a huge mindfreak for you.
I suggest that you set up a grid using the Grid effect then setup either Card Dance or Card Wipe such that they conform to the grid. Then place your individual mosaics into a layer, using the Grid as a visual guide.
Good Luck
RoRK
AE Training in South East Asia. AE templates for sale and rental. Click
here for more