As of September 30th, I took the #1 ranking on DH solo leaderboards, on the US servers. I completed Tier 45 in 13:37
http://us.battle.net/d3/en/rankings/era/1/rift-dh

I will try to complete T46, and MAYBE even go crazy and try T47 solo. However as of right now, I will use "cheats" to help me achieve this, just like how I got to my current T45 on solo DH leader boards.

What exactly is a cheat?

To me, it is gaining an unfair advantage. This is exactly what TurboHUD does, and which is why I use it. For those that do not know what TurboHUD is, it is a third party program which acts as a overlay to the game. Essentially, it reads from memory data that was received from the server. It has really cool features that I wish Blizzard would implement honestly. However there is two features which are used to "cheat", because they give an unfair advantage.

1. Mini-Map
This shows where every monster is in the local area, and the map itself (whatever portion of the map that has been loaded, usually in a local area). This gives me an unfair advantage over a player that doesn't use TurboHUD, because I can make better decisions on how to engage monsters.
2. Monster overlay
This overlay tells you what the elite affixes are on certain monsters, before you engage monsters.
It lets you know where that annoying invisible terror demon is.
.
Both of the above creates an advantage to the player, resulting in better decision making when engaging monsters or path choosing. Better decision making could make the difference from clearing GR45 on time, or failing GR45. So because I have this unfair advantage, I cheated to get to my ranking.

Here is the crazy part. You would have never knew that I was cheating, unless I honestly told you I was indeed cheating. For example, I could record (or stream) completing a GR45 rift on Twitch, and you would never know that I was using TurboHUD because it is an overlay.

Now here are my questions:

1. If a player is caught using a third party program such as TurboHUD, should that player be banned? Or is it conditional?

We all know very well that a player will not admit to using TurboHUD, because they could get banned. However we also know that TurboHUD is impossible to detected legally, because it just uses an application to read from memory.

2. Because of Greater Rifts and Leaderboards, are we encouraged to use TurboHUD (or other similar programs) due to the advantage of the mini-map and monster overlay?

Indeed you could perform the exact same actions as if you didn't use TurboHUD. However, you will not make the same actions if you didn't use TurboHUD, because the information it gives effects your actions (specifically mini-map and monster overlay).

3. Is the design of Greater Rifts suppose to be "fair"?

I honestly don't even know what's fair and what isn't fair. If there are any differences between any attributes or conditions, you can argue it to be unfair.

P.S. Unavoidable damage sucks

4. What is the purpose of the ranking system?

Indeed the ranking system is defined to be the highest GR completed with the best time. However, this has no meaning as a metric to measure things. If I can did GR45 once with build A, while you haven't completed beyond GR40 yet using build B, does that imply that build A is "better" than build B? Can such a metric be interrupted this way? Does this meaning change when we use an average of players, rather than a single selected player.

In fact, you can't even see any ranking beyond 1000. So most players won't even know their own ranking.

Thanks for taking your time to read my post if you made it this far! I might have gotten GR45 without TurboHUD, but I know that I won't do as well without it.

(>^^)>

There are a few Sunwuko build:

1. Genwuko - Among the most popular
2. Bellwuko - Spam bell for damage as well as proc decoy.
3. Hexwuko - Hex pant and TR and spam mantra to proc

I tested all 3 builds. Easiest T6 farming should be Hexwuko. You need to build up passive spirit regen as well as Guardian Path. Hexing pant will provide enough passive spirit regen while you just keep TR and occasionally Epiphany. Spam Mantra from time to time to proc decoy. Since TR pass thru everything, you don't really need to stop or DS or Serenity. Problem with this build, it's getting hard as you move into higher Grift which require more spirit that just passive spirit. It's still fun in T6.

Then I tested Bellwuko, you need FoT - Quicken for fast spirit regen. Once it's full, spam it. Most E die within seconds in T6 as you spam bell and proc at the same time.

My current build is Genwuko. It's better in term of damage output since you just focus in generating spirit using FoT / WoTHF while keep spamming Mantra and Sweeping Wind. For this build, you must not use Inna set since it will reduced Sweeping Wind from 75 to 15. Just keep punching thing to generate spirit and with the spirit spam mantra and win! Most high end build are based on Genwuko. The Flying Dragon is best choice in this case since there is chance that it will double your speed. More speed, more spirit. Legendary gem to aim for is Gogok and Mirinae.