Pets die fairly often even if you trait for their survivability and babysit them. AoE from bosses are very damaging to them and they will likely spend most of the fight dead. Kholer fight in AC dungeon and Subject Alpha in CoE are good examples.
My suggestion is to have the pets be invulnerable to damage when you dodge. Essentially they get the same benefits that you do when you dodge. This can help mitigate how often they die from AoE attacks in dungeons where dodging is essential.
This can be a feature that is given to all rangers or something that can be traited. If it’s a trait, it should be a 10 point trait at the highest to prevent people from being forced to sacrifice their builds for it.