Hello everyone!

I've a newbie question for all the veterans out there about stacking two tanks of the same type in a 8 man party.

So I joined a PF o1s yesterday on my PLD, the party already had another PLD and the healer proceeded to ask "Will we be alright with two PLD?". I asked myself the same question but for the sake of harmony I switch to my DRK.

Is there any reason why having two PLD will have a problem? does the dots not stack or something?