Tbh it's just your preference.
Boon Chrono
* very variable builds for more dmg, more cc, more quickness, quickness + alacrity (when u play 2 chronos)
* in conclusion u will need a lot of different accessoiries, weapons and armors to be ready for everything a chrono has to do
* u will most likely be the tank on certain bosses (best tank in game)
* Mesmer is the first class you should craft a legendary armor for (this guy needs a shit ton of build variety)
Quick Firebrand (qFB)
* you can quickly change it from quick to condi FB. Just exchange weapons (sigil of concentration) and consumables. So you have a DPS with the same Armor and Weapons (lucky-noobs.com)
* in PUGs you will often see no qFB, cause the job is done by a Heal FB. In that situation you can go to cFB and just do the same rota.
In the current meta you will see the Firebrigade, which means - 1 Boon Chrono, 1 qFB/hFB and 1 Renegade (Alacrity). Both classes are in the current meta. 2 Chronos are usualy not played, cause the Firebrigade will do more damage.
