After feedback from users I changed this unit slightly. Firstly, I removed vanguard because in combination with Stalk and this units high stats made them too overpowered. They now also require a level 2 smith in combination with a level 3 barracks because they are an elite unit and cost 1250 and 320 to upkeep.

I thought having their speed exactly the same as other Nagarythe units like the Shadow walkers didn't make sense because they are a heavier infantry, so reduced this by 1.