germany, because they are always ahead in units, and even if you think you have won against them, they will have one unit shipment that will swing the battle right to their favour.
china, because how do you micro against their units lol
dutch(on EP), because they never run out resources
otto/iro, because how do you hold their rush on qs LOL
and last but not least japan, because opponent may play like shit but at the end of the day, he is japan and his eco and op units carry him to victory
india, do i need to say anything really, stomps, urumi sepoy ceasefire, otto mh, can delete their army 100 times and still win
german, randomly have 40 more pop at 11mins than any other civ, big cav shipment swings after a fight where they get 2 shipments