As a suggestion to the devs, reducing the level requirement for the One Man Army talent would allow players who want to solo to have a more viable option at doing so earlier. I think that would be fun.
Level 4 is the level of encounters at the end of Fort Joy and through the early Swamp. Level 4 might also be possible to reasonably reach through mostly questing alone (largely due to a lack of level 1 and 2 combat encounters). Lowering the Talent requirement to Level 4 seems like it might be a good place to allow One Man Army.