I also play on PS4 and what I have done is similar to what Heilstos did as far as a macro. I just assigned it to my hot bar as apposed to a hot key and added a partysort line in case my party became unsorted for some reason. That said there are 2 other things I did to make this work for me. I sorted my party list as DPS - Healer - Tank. This way my Dps were in slots 2-5/6. Additionally I sorted my DPS list so that ranged would be towards the bottom and Melee towards the top. By doing this, if I need to get to the MT quickly, I utilize the "Assist" button that I assigned to my L3 button or press up 2/3 times on the D-pad. If I'm in 4 man the 2-3 will let me select the proper part member without having to adjust my macros and they work as normal in 8 man content.