Favorite Lane partner?

I have played that stuff in 4-5K MMR stacks. Allow me to disagree.

Necrophos is a semi-jungler like Sand King. SK gets 9-10-minute blink and he doesn't need to steal farm in lane. Same for mek on necro.

Pugna is a nuker. Just like every nuker he only needs HP to stay alive, that's it. The pushing power is the same. Besides he can farm very efficiently as soon as the laning stage ends so mek-Aghs is easy. Get Soul Ring, stack jungle or clear waves, ez gold.

I don't think you can really say one; it totally depends who you're laning with and against!

E.g. If you're Razor, an Earthshaker can be a great ally if the opponent can't bypass Fissure. Lich can be a great foil for a Faceless Void by getting him space and keeping the lane under control. A hero with great lane presence 1v1 might just want a Sand King who semi-jungles and occasionally turns up to gank.

If you don't know the carry, you'd look at the offlaner you're likely to be against, and pick a hero who can do well against them. If you don't know that either, ask your carry what they're going to pick, or base your choice on what you think the rest of your team needs.

If you're really unsure, I'd pick a hero who's pretty flexible - Jakiro, Lion, Crystal Maiden - all of these heroes can harass/stun/jungle reasonably if required.

Chen is a bit of misfit for lane support, but lane support -> semi-jungler is a sliding scale, not an absolute choice. For example, Chen could be quite active - pulling the lane, ganking, as well as jungling for himself. You might even send a jungle creep to harass. In the same way, Sand King might barely be in lane if his carry can do fine without him, but could also be more active by pulling, ganking etc if required. It depends more how you play them than the exact hero you pick.

Even a lane support might spend some time out of lane - warding, picking up runes, pulling, stacking etc. As well as being in lane sometimes. It all depends how much your carry needs you there - e.g. a Razor or Viper might want as much solo XP as possible, and not need you. A Spectre might require you to be constantly in lane babysitting.

I am very happy, that Jakiro is receiving some love. He is truly flexible and fits almost any line-up. He is not the best in anything, but his mixed powers of pushing, harassment and crowd control, decent stats gain and supportive playstyle makes him a really good ally.

im actually quite suprised that so many people picked dazzle. he is really strong with meepo or shadow demon for example but he definately isnt the first hero i think about when i play with a friend and we are like 'he lets wreck the enemy lane'.