Guild Wars 2

I am looking for some help in choosing a profession to play as i don’t find my current profession (elementalist with tempest auramancer build) all that much fun to play.
I have played healers and support classes in every MMO i have played. I like these roles because it is a group role i find fun to play and it also usually mean that these classes are good at soloing stuff on their own. They might not do the most dps but they can last for a long time.

I am looking for a profession that do the following well: good support, good soloing/sustain, in PVE content (map meta events and fractals mainly)
Bonus points if they don’t die all the time on champion events and such.
I do not care about PVP one bit.

I don’t need long paragraphs about the different professions but i would like to request specific information.
Saying “mesmer is really good group support” is not very helpful to me, saying “mesmer can keep alacrity up all the time” would be much more valuable input

I have played druid, elementalist and revenant all as support;
-Druid didn’t really click with me. The buffs, e.g. from pet swap, does not last for a long time and the healing mechanics are not fun at all.

-Revenant; very interesting visuals and mechanics. I hated how squishy i was though, and how having buffs up meant that i had no resources to do anything other than autoattack. Bonus points for being able to keep buffs up 100% of the time though.

-Elementalist; i have only played as an auramancer and it has been fun. Having 9 auras that all heal for a bit and give my group several buffs, while doing decent damage, is nice. I am sick of dying all the time though, particularly in the new season 3 map. I literally did nothing but die for an entire champion boss yesterday. Die, get knocked around on the ground taking me gradually from downed state until death, get resurrected, rinse and repeat.

I am not interested in the thief or the necromancer as i am not a fan of those archetypes.

I am mainly interested in learning more about guardian and mesmer support capabilities.
How do they support? Which boons do they give? Do they have 100% uptime? Does being in support builds handicap them, and how? (By handicapped i mean e.g. Revenant with legendary dragon spirit having no resource generation with all buffs up)
Are they good at soloing? (Not necessarily with the support build) By soloing i mean HoT veterans, Verdant Brink nighttime soldier escorts alone, etc.
Do they die a lot on group events, champions, etc?

Any input is highly appreciated!