Endure or Booster?

Now, most people will think Booster is better than Endure. But is it really so?

Mathematically, more Endure will save you more money on MP Pots, albeit on a pretty slight scale. First of all, let's remember that Booster's effectiveness is not affected by the skill level, which affects the HP/MP cost and duration only. HP cost is a non-issue with Drain, so let's focus on the MP Cost.

* Level 3 Endure, Level 18 Booster: Booster's duration is 180 seconds, cost 12 MP, and in 180 seconds you will recover 108 MP. The amount of MP gain per 10 seconds is 5.1 MP/10 seconds.
* Level 10 Endure, Level 11 Booster: Booster's duration is 110 seconds, cost 19 MP, and in 110 seconds you will recover 143 MP. The amount of MP gain per 10 seconds is 11.3 MP/10 seconds.
* Level 15 Endure, Level 6 Booster: Booster's duration is 60 seconds, cost 24 MP, and in 60 seconds you will recover 108 MP. The amount of MP gain per 10 seconds is 14 MP/10 seconds.
* Level 16 Endure, Level 5 Booster: Booster's duration is 50 seconds, cost 25 MP, and in 50 seconds you will recover 95 MP. The amount of MP gain per 10 seconds is 14 MP/10 seconds.

As you can see from above, with more points in Endure and less points in Booster, the amount of MP you gain per 10 seconds is mathematically superior (until you have less than 5 points in Booster). However, frequent stops to do "booster" makes people nervous and feels like a waste of 'time'. Since 5 points in Booster and 16 points in Endure really has the same effectiveness as 6 points in Booster and 15 points in Endure, it is preferred to do have a max of 15 Endure so that you can keep 6 Booster.

Of course, with higher booster, you'll be able to train faster for a longer period of time without having to re-enable booster. The mesos you earn can be used to buy mana potions, to offset the lower recovery rate of endure. Monsters that are level 35 and above are easily killed by level 40+ thief and even faster with booster. Also, it is generally good practice to have MP pots with you anyway, especially if you don't have time to wait somewhere for endure to recover your MP.

Regardless of your choice, keep in mind you need at least 3 points in Endure to unlock Drain.http://strategywiki.org/wiki/MapleStory/Thief_Guide/Builds