"Playing 2, 2 for 5 ATK" is in fact impossible- a 2 Gives 2 DEF, not 2 ATK (this is true for any deck, as ATK always costs 2 stamina and DEF costs 1.)
Do I understand correctly that playing 5 + 5 (or a 3 + 3 in a mrpinky deck) with the force rule will give 5 ATK and 3 DEF (i.e. each stat increases by 1.) If not, how is the increased stat decided?
Finally, I'm assuming this bonus is applied at the end, and if a player lays down 4♠ K♠ 4♢ they only get 7 ATK, not 8?