This class scales heavily with the amount of conditions appplied to the boss and also the duration of the fight. The faster you phase or kill a boss, the stronger Holosmith is.
For newcomers, it's rotation is fairly easy and fast to learn but mastering the class requires managing the mechanic.
If during you won’t use any toolbelt skills, you have to start with into so your second will fully channel and you don’t have to interrupt your auto attack chain.
Use , above 51 heat, whenever it’s ready.
Use and on cooldown. When in try to use them right before and so you lose less DPS by interrupting your auto attack chain.