Of giant egg-shaped monsters

With the inclusion of 6.84's more early game meta, how viable are lvl 1 roshan rushes? Drafts consisting of pos.1 WK, pos.2 Ursa and pos.5 Lich with several fillers could quickly get rosh even before the minute 0 bounty rune spawn. Ursa stands with WK to deal the final blow for a quick xp and gold advantage, coupled with the aegis that can be picked up by Ursa to deal fast first blood or more.

Can it work?

its an ancient technique involving nature's prophet wk and ursa along with a leshrac thrown in for good measure

Well yes, but what are the advantages of doing it and will the draft needed for a successful lvl 1 roshan actually be viable for other task like laning or teamfighting besides rushing roshan??

You only need Oracle support to make it work. Go WK Oracle safelane, Ursa Lich dual mid and ditch Furion on the offlane.
Since Ursa Lich will get their farm with Lich's lanecontrol, Furion can transition to jungle if the offlane isnt going well.
Oracle WK also has good kill potential if Furion tps in. So all lanes have guranteed farm. The only problem is that WK and Ursa need to snowball, so Oracle will have to rotate a lot since his physical amplification will drop pretty much everything if ursa is pounding on it or furions treeants are.

Biggest problem is that only WK has a stun, so tps will be a problem untill Oracle has Euls.

If the early game goes well though, you can deathball push all towers by min 15-20, because of WK aura, Lich armor and Ursa pounding. If a mek can be picked up early as well it's guranteed rax on at least 1 lane.

The advantage is a huge influx of expierence and gold, to the extent every hero who does Roshan at level 1 becomes level 2 and a half I think? If all 5 do.

The issue with Level 1 Roshan Drafts, is they are usually very predictable. Like the efficient ones always are (You can do slightly less efficient ones with the inclusion of Slaves instead of lifesteal), and thus any competant opponent will check the Roshan pit and contest. I've seen minus armour ones as well, with like Shadow Fiend skilling the passive first, and a Venge to use Wave of Terror to make it easier.

And if you commit to level 1 Roshan and get punished for it (And even don't manage it), you get screwed for the laning phase (Partially due to poor skill builds as well as are usually needed to do it) and then beyond.

So it's possible, it's just risky. It's also something you can not do regularly in organised play, because people will spot it out, and then just be able to contest you.

Me and a good friend of mine often just do a lvl 1 Roshan with only Ursa and Io. Wisp tanks for a bit, and then get low hp, proceeding to use a Healing Salve while tethered to ursa when he has low hp and is tanking Roshan. and then IO tanks again. super easy really, as long as you don't get chained bashed and die as IO.

Ursa starts with a Poor Man's Shield, and a salve. Wisp starts with as many salves as he can buy. Ursa skills Fury Swipes, and Wisp skills teather of course.