Can This Mundo Strategy By Viable?

NOTE: You Should Look At The Gyazo Screenshots to understand what I am saying. NOTE: This is silver, but I think it goes well with at least plat (if done correctly).

I played a game of Mundo Top with Conquerer against a Diana Top with Conquerer. As expected, I lost lane hard to Diana Going 1 4 to her 5 1 (I think).

I decided to group up and be there for my team and got 2 kills, bringing me back into the game.

With the help of red buff I was able to kill Diana and get shutdown gold.

I then proceeded to snowball the game.

This isn't the best example as Diana did nothing with her lead (I had no idea where she was), and I am in silver, but it shows the potential of Conquerer Mundo.

Here is the endgame: https://gyazo.com/de9d7a0fb1ec948e52de52ccadbdf894 Here is the damage dealt: https://gyazo.com/0c3876e3e53e3ff31353dd5ed55f6752 Here is the damage taken: https://gyazo.com/c2d03222b2c2c64f8eaf81607bd72aab Here are my rune (I went Adaptive and 2 mrs for the third part): https://gyazo.com/f6ab777bb2d61c02556fc64d96e7ee65

LISTEN HERE: Before you tell me I am a lucky silver player, let me tell how to do this strategy (so you can trust me more):

1. You need to play safely in most matchups as you lose trades to high damage dealers (if you don't play perfectly) and ranged champions. There is no need to stack Grap because you don't have it.
2. You want to get a tiamat first. If you don't have enough gold on back, get boots and some long swords.
3. Once tiamat is done, go into your first counter item and counter boots. For your first item, you wanna get something that will help you through laning phase (Items I go for are Spirit Visage, Adaptive Helm, Deadman's, Thornmail, etc). For your boots, counter the enemy team (Mercs for high cc, tabis for high amounts of aaing).
4. After laning phase is over, group with your team and be a frontline (simple mundo stuff). You RELY HEAVILY on a team comp with some cc since you don't have that much. Having a healing support is good too.
5. Your next buys are itemization buys against the enemy team.

Tell me if I said anything incorrect in my guide, or if I am not being the most optimal with what I am given.

I really think this can be a good idea to try out if you are a Mundo main, however, there are scenarios in which grasp might be better. For instance, if you are against a Tank, you can proc grasp ALOT in early team fights, however, if you aren't you won't proc it enough for it to be effective (IMO!!!) Plus, you get to do a lot of damage while building tankiness item, which is quite broken (IMO!!!)

Tell me your thoughts on the game and what I can do to improve my strategy.