Looking for help with a support focused PvE build

Hi, returning player looking for help planning a support mage build. Ideally I'd like to have war or void magic spec'd so I could work/grind alone as needed. I've just read that summoning has been added but I was planning on going 100 coord/focus/self and taking melee defense at least trained.

Any tips would be great.

Oh and my goal with the build would just to be useful to groups/guilds in various spots.