Pick vs Unsquish

Well, I hear a lot about this or that hero is great versus squishy heroes. In my mind, I am going, "Well who isn't!?", but I refrain because I am noob. So, my question is, who do you pick against the unsquishy then?

Here is a typical pub lineup on the opponent team:
Phantom Lancer, Huskar, Spirit Basher, Riki, Sniper

So, my only squishy target is Sniper, and only when he is alone, which will be never after early game if he is smart....

What do you pick?

I often think the only way to counter these kinds of heroes is with melee of my own. Casters die and die quick in my experience so far..

Phantom Lancer vs Lina

Any spammable AoE nuke for the illusions Lina has two and an ult to finish the real one

Huskar vs Axe

I always pick axe to counter Huskar. Huskar leaps you pop blademail then finish with your ult. Two buttons he's dead. Gotta be quick on the blademail.

Spirit Breaker vs Bane

We had a whole thread devoted to this subject of how to counter SB my personal choice is now always bane. Fantastic healing nuke with brain sap + you can hold him in place with nightmare and fiends grip. Although this will rely on your team mates to finish him off you will be able to escape most situations with a quick nightmare. Or better yet nightmare yourself.

Riki vs Bounty Hunter
two heroes who do basically the same thing but Bounty hunter has track which always gives him the edge over Riki. Slardar will also work or supports who place wards.

Sniper vs Storm Spirit

This was a tough one for me. You basically want someone who can get within range quickly enough and then disable him ASAP. Storm Spirit has the longest potential initiation range in the game and a nice if not small disable to go with it. In the end though it always depends on farm.

As you can see I only chose one tanky pick :p

Nyx beats sniper. If they go all carries, get a pushing lineup that ends before 30 min.

Looking at that line up, they are relying pretty much purely on physical damage. Assuming your in a pub, the best things you can do to stop it is support ward, 5 man dota and find a way to remove their physical damage.
If it was me, I'd go Omni, either Alch or PA with BF, Chen or wisp (if someone can play them), TA for mid vs sniper (early game, he is too slow) and Dark seer (so good at offlane)

Simple reason being, Omni stops their entire team with his ult. Chen/Wisp can bring your team back to almost full health. Once they initiate, they are out of spells. Pop Hand of God and Mek and you're ready to fight. Sniper gets good if he can free farm. TA can simply out farm him and out gank him. If you're finger is quick enough, he will never get assassinate off on you (refraction blocks off instances of damage).
Stopping SB and riki is simple. Vision is everything. If either/both of them get fed, they will hurt you late game. however, if you can stop them early, it's not a problem. Observer wards will show SB charges across the map. Group up, kill him (watching sb charge through tether is funny)
As far as pl, I love watching a PA blink in and BF kill 15 illusions in 1 hit. Even his escape can be countered by warding. But once again, don't let him get fat.

What the above shows is why riki, sb and sniper aren't picked in tournament games. Because they are countered by good support players and communication. We played a game the other night that ended at 45-1 kills (so pissed at our feeding blood seeker). We won because we talked constantly and played really well together.