I think it'll definitely be Faceless Void and if you have the items, you can make any hero "gg" in 5 seconds (timestop)

Luna can have the items but once Mr. Void timestop, he can finish Luna within 5 secs.

The thing about timestop is you can hit your opponent but he can't hit you.

It's all about team work and sometimes it's a bit hard to dodge during gang-bang time, stunners that assists, hex/guinsoo, etc.

For the same reason, any hero might easily escape even against the strong luna if they have a dagger.

This is one hero that normally gets banned during competitions.

Of course you need MOM and power treads plus a butterfly. The reason is because you want to hit as many times as you can when you timestop.
Also, having MOM alone isn't enough and you need some damage items like battle fury, buriza, etc

Why do you need a heart? Not all hero requires regen items and some are pure full damage, like drow ranger.
Your job is to timestop and hit as many times as you can in 5 secs. If you want to double/triple kill, you need battle fury because it'll splash damage.

According to your setup, you probably won't get to kill anyone during end game because:

1. Hyperstone VS Butterfly - Void is an AG hero and butterfly increases it's attack speed dramatically and provides evasion. How can a hyperstone hit faster than a butterfly?
2. 2x basher - Why would you need basher when you timestop? The other party already stopped and can't move
3. 2x MKB - Why waste on the same item? Might as well get a buriza

You calculate the damage from your items and you probably can't even kill a hero with 2000 hit points in 5 secs (Level 3 timestop)
Anyway, everyone has their own strategies so it's up to that person.

Competition is different sometimes because they want to push and win the fastest they can. Plus, it's all about team work and gang bang. Their hero can always combo; like range heroes can hit from outside the timestop.

MOM is good as not only you can hit faster, you can run faster and there's lifesteal This is one hero that needs full damage, not regen items.

Thanks. If AGI hero has the items plus a satanic, they can easily clean sweep.

This setup is not bad but it would depend on the player. If you get MOM, it's a lot cheaper and you can start killing (MOM + Treads + Hammer).
Hyperstone is good too but it doesn't provide lifesteal but nevertheless, why assault?

Including Goblin Techie?

If we're talking about competition then it's a different case. If you're playing with friends ending up buying a heart, you'll probably have problems doing a double kill with the timestop at level 20+

Anyway, there's always a difference in opinion and for that reason, there's always pros and noobs I mean, void can get heart and assault too, nothing wrong since more hp and defence is what that person wants, lol.

I have the same understanding and agree on this.

Why bother about longer hit points because if we have full damage items, we can already kill 2-3 easily during the chrono. Can the remaining 2-3 enemy heroes kill FV after the chrono when we have time walk and another 4 team members around?

Unless we're talking about 1 VS 3 then maybe it makes some sense to get a heart.
If FV doesn't have enough damage, it's a total waste to chrono because:

1. You can't kill the enemy and after that, you'll get killed despite having a heart.
2. You're not a killer and not even a tanker. So what is FV with such setup?

Again, competition tactics is different from our daily play with friends.

The best thing is to try it ourselves I've tried it before and if I chrono Spectre or NA, I guarantee they'll be gone in 5 secs with the set of damage items. If both of them are in the chrono, better still - double kill.

Btw, FV is one of my favourite heroes.