So this is the only thing I'm a bit thrown off by. What do you mean by "constitution" because to me, it's "a person's physical state with regard to vitality, health, and strength." And in this case, his constitution, as a ranger, would be high. I just like to make sure we're on the same page, so I just need to know what you mean by it in your CS.
This also, maybe just have a brainstorm to rethink. Because how I picture it, is that all the other players have to remember this ability and remember to roleplay this magical boost, which isn't ideal for a character ability, since we want your character's information to be focused largely on your character and your character's actions. If you want to keep it, I won't argue, but maybe just have a think about how you can make it more of an action on your character's part and less of an ability that requires other players to keep track of it.
Other than that, you just need to take your two homemade soul abilities and give them a line of development, as well as limiting factors. You can look on the website at the updated soul abilities to get an idea of what I mean by that. They all have a "initially" and "with more skill" section, as well as a "skill level is dependent on . . . ." etc.
Now, his 5th ability. . . .
Eye of the Skies: Alathon gains the ability to enter the mind of a bird and claim its sense as his own, allowing him to scout regions undetected and get a perfect image of the lay of the land. At first, only small songbirds may be used but with time he can harness the fastest fliers. Initially, this ability is hard to control, visions will be blurry, the bird will feel bothered by Alathon's presence and largely uncooperative. However, with time, he can learn to connect more with the nature and spirit of the birds and eventually they will welcome him. At this point, he can even will the bird to go certain places and act certain ways, like a well trained companion of the senses. If he ever leads a bird to its death, he will suffer immense and long-lasting pain, having to bear the sensations of death for himself.