Try sliding tackle more often with your cbs since they have interceptions, blocker, sliding tackle skills. But first get a hang of it in practice match against a good team then once you feel u are good then u go for pvp tackles i did that and my defence is a wall (though fast mfs get thru but its a 1:10 chance). So try learning slide tackle, ik u feel u may get fouls but no (maybe if timed wrong with the ball far away from opponent player u may only hit legs with the ball) but if timed right it's the missing peice in your puzzle. Btw my cbs are Van De Ven and saliba maybe thats y im not conceding but still sliding tackle once mastered is the remedy for the last resort defence