Guild Wars 2

As i know for VG:
2 chrono, 2 druid, 2 condi, 2 dps, 1 ps, 1 cps
1 druid, 2 condi and 1 dps go green circle.
2 condi and 1 cps go red guardian.

What is it for other bosses (including pre events)?

Mostly it’s the mirror comp with the exception of Deimos and maybe Cairn. On large hitboxes ele pulls mostly ahead (gorse, sloth, KC, Samarog) from other dps classes. On Sloth and Xera try to use power classes as on Sloth he loses condis in every sleep phase and Xera converts condis to boons. On matt lower theoretical dps from condi mes might be better + you get reflects. All in all the core 6 support classes are mostly the same and dps changes according to mechanics by the boss.

NotOverlyCheesy.9427:

Mostly it’s the mirror comp with the exception of Deimos and maybe Cairn. On large hitboxes ele pulls mostly ahead (gorse, sloth, KC, Samarog) from other dps classes. On Sloth and Xera try to use power classes as on Sloth he loses condis in every sleep phase and Xera converts condis to boons. On matt lower theoretical dps from condi mes might be better + you get reflects. All in all the core 6 support classes are mostly the same and dps changes according to mechanics by the boss.

Xera only converts if you have her in crystals.
Sloth if experienced Power will get you faster kills, Condi will get you safer ones.