Playing on PS4 with a controller, so using focus seems to be fiddly at best. Making tank/dps1/dps2 macros seems to be working well, at least for light parties. The only full parties I've been in now seem to be me as newbie tank usually being lost or locked out of fights because the group rushes in while I'm stuck in a cut-scene. So I've just been thankfully accepting the carries, apologizing for the delays, and figuring I can sort out targeting as I keep leveling along.