[quote=ImportantNobody]
I won't be including them then. I thought we could have a faction but apparently I was mistaken.
[/quote]

You can create a faction, but to make it as you want and to make it inherently fair for your opponent the NoW tourney rules will be used, which makes it as you say four weak summoned stormtroopers vs. Han Solo, not four Stormtroopers who are equal strength to Han. 

Size limit? Physical size? I suppose as large as the Marvel Comics Celestials who tower at 2,000 feet tall.