Boost marksman bonus so the troop type is actually useful, as they currently seem pointless in most scenarios. Alternatively, boost mounted marksman by an amount so she isnt insanely strong (as that troop type already is) but becomes a viable option for some attacks.
I confess its very hard to balance, but i think making an 'elite' exclusive marksman/bow type of skill could be implemented to add variety, without it being too strong.
I think woody is making some good suggestions, be good to hear other peoples ideas too, but we do need to be mindful of the fact that looking at the current skills on test Vargus and Anslem look like they will gain more of an edge. Thats not even considering how fast people can do even basic ali/tailor guides with test skills, as any vets can become MGs, and MGs turn into Super Major generals lol
Major generals are what generally determine speed most regulars do addys as they are the best general (with tav general being no2 for blocking purpose imo) and do not own large number of mmas or have generals in large enough quantity to do them 10-15 general blocks from spawn etc.
Obviously when your at that point, and have access to that resource and firepower, the largest benefit of skill tree will prob be bonus xp/travel times to addy.
Excilsor means we level faster as new players so getting to lvl 50-60 and the juicy stuff can take 6 months if you chose, so nusala could become redundant pretty fast without a small amount of tuning. The MMA already suffers from this. She is awesome at what she currently does, i just see no incentive to buy her now which is kinda sad, as i dont care about saving costs of recs or militia (by using her with bows on easy adventures). Hopefully we can find or promote a dif option.