SMT: Imagine Rounding Expertise

So with all the guides to make certain types of characters, one thing is in common for all of them. There is this strange concept of "rounding" your builds. Here is a short little guide on what it all means.
As per usual read ---> this <---- first. So much good stuff already written down.

There are three stages of grinding:
 Pre-30:
This is arguably the most important time in your SMT career. In the Home III magic shop, the robed dude sells three different items that you can use ONLY if you are under level 30; Lethe Waters, Lethe Bottles, and Hourglass of Reversal.
     Lethe Water: Removes one rank (100 points) of any expertise chosen.
     Lethe Bottle: Removes one class (1000 points) of any expertise chosen.
     Hourglass of Reversal: Sets all stat points back to 0, allowing you to reallocate them.
These items are INCREDIBLY important in guaranteeing enough expertise points for your final build.

Lets take a mage build for example whose final build looks something like this:

Class 10 Destruction Magic (Maxed)
Class 7 Magic Control (Maxed)
Class 2 Rush
Class 4 Curative
Class 8 Support (Maxed)
Class 8 Curse (Maxed)
Class 3 Bless

This gives them:
Class 5.3 Enhancement
Class 7 Curse of the Wretched
Class 6 Demolition Dash

For most of their time leveling between 1 and 90 however they will have someone else to do the buffing for them. So what they want to have is their main damaging expertise and some basics of the other two chains unlocked. So Pre-30 their build may look like this:

Class 2 Curative
Class 2 Support
Class 1 Bless
Class 2 Curse
Class 3 Magic Control
Class 5 Destruction Magic
Class 2 Rush

This gives them the basics from all the chains. Now what you want to have a perfect build is exactly Class 2 Rank 0.00 for Rush for example. How can that be accomplished? The newbie lethe waters mentioned above. If you grind to Class 2 Rank 1 of rush and then use the lethe water you will have exactly the expertise you need, leaving the spare .07 points you would have wasted for another exp.

90:
So now you've grinded till your brain has exploded. Now what? In order to keep this perfect rounded build you have constructed you need to keep up with it. Every 10 levels you get another 1000 exp points. Use them. Immediatly. Grind another class into your main exp chain if you are not maxing that exp.

If you are maxing something, in our example something like destruction magic, you don't need to worry as much about hitting exactly 1k since the game will round your exp for you when you get class 10. Its still a good habit to be in to grind every 10 levels. It breaks up the grinding process a bit and ensures you wont forget something.

So continuing the example by level 90 the mage should have a build that looks like this:
Class 10 Destruction Magic
Class 7 Magic Control
Class 2 Curative
Class 2 Support
Class 2 Curse
Class 1 Bless
Class 2 Rush

This means the main part of the build (ie the damaging part) is done.

Post 90: 
Here is where you start doing things for your expertise. Look on the wiki to see the requirements for obtaining the extra exp. However keep in mind you still want a perfect build. Once you get the 1k exp or whatever USE IT. Odds are for your secondary classes you wont be maxing everything (curative and bless in our example). Keep that hard earned rounded build rounded and you are good to go.


FAQ

Q: Why should I grind an expertise then lethe it down even if I will be getting more of it later?
A: You want to round off things before you need to level if possible. Yes you are just prolonging the    inevitable spam of a skill on a hua po, but you will be happy about it later on.

Q: So....should I be using a lethe after every Class?
A: Nope. Don't lethe unless you are done grinding that particular expertise for the time being.