I main healer so sorry if i ask stupid question since i only can look this from healer perspective.

Can dps aggro more than tank throughout the fight? SAM and RDM is the only class i always see them doing this but, even then its only for the first 15-20 seconds of combat, after that aggro back to tank and everything went as usual. As long as tank play as usual, i never see any dps can out aggro tank in combat from start to finish, unless its a dg level 30 and below since tank is still not at their optimal playstyle.