Hisana is also not specialized in anti-army or battlefield-shaping techniques.
On top of this if you pay attention the entire fight was Hisana performing recon. Not once did she attack the same way twice and she learned a lot of valuable things.
Explosive Kunai @ Boat:
From this we found that even with the chakra armor the Snow Ninja are capable of water walking. This tells us that techniques like clipping their wings (flying armor) or sinking their transport (ground armor) are ineffective at eliminating them.
Arrow-Defying Hurricane Parry:
Instead of dodging Hisana used this as an opportunity to determine if her new deflection technique was effective against Snow's kunai launchers. This provided her field combat data on the technique, proved its effectiveness in defending squishy targets (Koyuki), and ensured that if a train vs. rebels fight happens we can save them from the massed kunai fire.
High Speed Slice:
This is the first of several attempts by Hisana to determine the durability of the chakra armor against physical attacks. With this she found that it is possible to slice straight through it like normal armor
if you can put enough force behind it. Not necessarily useful for herself, since building up that kind of momentum is difficult, but it does establish that sufficient raw physical damage does overwhelm the armor.
Sealing Art: Thousand Bird Hurricane Strike:
It was definitely a very expensive strike but one of the few known counters to the chakra armor, from canon, is the Chidori. Verifying that Hisana's sword based Chidori worked, and that something in the conversion hadn't screwed that up, proved we have at least one reliable, albeit expensive, attack.
Touch Blasts:
Explosives were demonstrated to have at least some effect on the Snow Ninja in canon so testing if Hisana could just pull an Aiko and touch blast them into oblivion was worth trialing. This was met with mixed results with only 1/10 actually dying but it did injure them which does make it useful, depending upon the actual cost of the technique, and is likely damaging to the Snow Ninja's morale.
Razor Wind Cut - Breastplate:
It was expected this would be ineffective but it is still important to verify your assumptions wherever possible. With this Hisana has confirmed her regular attacks are effectively blocked by the chakra armor, which is something both we and she assumed from the start, so alternate tactics are confirmed to be required.
Razor Wind Cut - Neck:
This was actually something of a surprise. We now know that a successful strike at the weaker areas of the armor can bypass it when it would otherwise be blocked. This is great news for both Hisana and Hinata. Jyuken is a very precision based style so while she'll have to shake up
what she targets the precision itself shouldn't be too bad for Hinata. For Hisana it isn't exactly her specialty, her sword techniques have long let her kill regardless of hit location, but she does generally have a speed advantage that makes precision blows easier.
In short while we did expend a significant amount of chakra, at least from Hisana's primary reserves, we also gained a lot of information on how the chakra armor works. Best of all this is information we can freely share unlike the canon information that has to be restricted. About the only thing of note I can think of that we didn't test was seeing if collisions cause the armor to explode. However that is something that would be hard for someone of Hisana's fighting style, isn't exactly relevant to Hinata, and Karin (the only one suited to such attacks) should already know that from our shared metaknowledge.