Hello and welcome ot the LE community!
I glanced over your build and it looks decent. There are some slight inefficiencies, but nothing major.
This would definitely bring you through normal monolith up to empowered, when you use the right items.
My first question is, do you want to deal the majority of the damage yoruself or do you want the Bear to deal the damage?
Your idea of a hit-based build, that utilizes bleed ot maximize the damage of Summon Bear is great. But you really need to go all in then. Hybrid builds usually don’t work that well and you only chose one companion skill.
First issue I discovered: You only took one of the Solo Companion Beastmaster Passives (Natural Bond), but you forgot to take Artor’s Loyalty (that is another 85% more damage for your bear).
Alternatively, if you want your minions to do the heavy lifting I would suggest going with 2 companions and also spec into the Raptor, which has a lot of bleed support as well.
You could also ditch the bleeding part and go hit/crit based. (respeccing swipe into Twin Fangs + some adjustments to the passives and skills).
Regardless of what route you will go, there is anotehr passive that you completely neglected: Rending Maw and Hunters of the Deep.
The latter will give Aspect of the Shark also to your companions and the former will make you (and your companion) cause armour shred, which is very strong.
Next thing: You spend 8/8 points in Life in the Wilderness, but not a single point in Avian Shelter or Hawk Wing.
Life in the Wilderness is a very strong 1 pointer and you usually don#t need to cap it.
Hawk Wings is amazing and basically provides you with permanent haste uptime during combat with enough points.
Avian Shelter doesn’t need to be capped, but is much better at keeping your bear alive.
Once you enter higehr difficulties its important to balance offense and defense.
You really want to keep your Bear alive.
Overall your build is solid and will succeed, but there are a lot of things that can be optimized.
Since you left your items empty, I can’t say if the rest of your plan will work or not, but the gear will also be very important, especially for the survival aspect.
If you develop your build further and want more help just post an update here, maybe with items as well.