The Most Under Rated Hunter Mid (Skadi 8.9)

From what I've seen with a few skadi players reccently is that they usually upgrade Bluestone Pendant into either Bluestone Brooch for a more damaging option or Corrupted Bluestone for a little more utility, in my opinion Skadi should opt into selling bluestone for a different item, usually:
Bloodforge if you are consistently getting kills as it is the second highest physical power item for hunters, it allows you to snowball a fight in your favour and is a better option than Bluestone Brooch for damage or sustain as it gives 30 more power and the 12% lifesteal is much more helpful late game than 30hp5.
Odysseus' Bow is usually bought if you are lacking attack speed on skadi as it gives a large amount as well as 60% scalling on the lightning bolts in the passive which usually equals a lot of damage with a full power/pen build, compared to Corrupted Bluestone which only gives 20% attack speed and 75 damage over 5 seconds.

Mantle of Discord and Magi's Cloak both offer way more defencive stats than Corrupted Bluestone if you need them as they are bulk defence items, they also provide bettter utility passives, both offering cc immunity and mantle giving a stun passive, Magi's Cloak also gives 100 more hp than Bluestone Brooch

Spectral Armor is just a necessity against a team with 2 crit gods on it (like a Mercury and Jing Wei and offers way more survivability than either bluestone upgrade will give.

I firmly believe skadi's potential in carry is so poor compared to her potential in mid/jungle that there is no point in plaing her there, this is becuase of multiple reasons:

Reason 1:
Skadi's main strength is in a 1v1 scenario where she is face to face against a squishy, in mid she instantly starts off in a 1v1 against a mage (who will most likely have lower base health, protections and auto attack damage than you) allowing you to have instant pressure on that mage, in adc however, you will start off in a 2v2, against a god who has higher base health and protections than you, who will also be with a god who has auto attack damage that is even to yours, this will make it harder for you to gain pressure on the enemy adc, and you will most likely struggle till you both supports rotate.

Reason 2:
Skadi has more access to farm and easier rotations from mid and jungle, this helps skadi as she requires a lead to have a prescence in the late game, in mid she can easily invade farm from the enemy mid lanner and will have the ability to rotate on duo lane or solo in order to push that lead in further, skadi adc is simply unable to gank due to the placement of the lane.

Reason 3:
Skadi doesn't use crit as effectively as most hunters, skadi is incredibally ability based and as of such crit is innefective on her, she also has no attack speed stim or auto attack amplifier to help further aid her crit damage, skadi also does poorly into hunters who buy devourers gauntlet as she won't be able to burst them down due to their sustain.

Your second ability Rune Of The Hunt can body block any ability that won't pass through minions like Scylla sic'cem or Sobek pluck, it also blocks auto attacks

Skadi's first ability only boosts kaldr's normal attacks, it doesn't boost his dash damage, however it also sets him up for multiple bassic attacks on any enemies who you hit with Piercing Cold

Kaldr does not allow the enemy to lifesteal off of him as he has no health value

Abilities that do their damage over time like Anubis Plague of Locusts will only damage kaldr once for the initial hit, however this is not true for jormungundr and Izanami basic attacks which will damage kaldr for every instance of damage that they deal.