Serial Leveler

The concept of a Serial Leveler is to create a Mafia Wars account that can level fairly continuously for hundreds of levels. A Serial Leveler can reach level 100 in hours and level 200 in days. There are two basic types of Serial Levelers. One based on Energy and the other based on Stamina. In both cases, the basic idea is to have a large enough pool of Energy or Stamina to be able to reach the next level without waiting on your regeneration timer.

All Energy Character
The All Energy character is the classic type of Serial Leveler. It is still viable but the effectiveness of the strategy was reduced in October 2010 when Zynga lowered the ratios of some of the most efficient jobs.

Strategy
The focus of this type of character is to put all your available skill points into Energy and concentrate on Jobs that provide the highest XP / Energy ratio. For this reason, it is highly recommended that you use an informational bookmarklet like ExpEnergy.

The goal is to always be able to reach the next level before running out of Energy. Upon reaching the next level, you get a free Energy refill and can continue to level.

An Energy Pack should never be used to help you level. Instead, use your Energy Pack to help you complete Job Mastery on low xp/energy ratio jobs or to gain consumables that can be used for higher xp/energy ratio jobs like "Run Illegal Poker Game" in the Enforcer tier.

Critical Success Factors

 * During your earliest levels, you'll primarily be doing the job "Bank Heist" in the Associate tier.
 * Save your first Energy Pack to collect consumables for "Run Illegal Poker Game"
 * It is absolutely vital you have an 11% Wheelman and 11% Mastermind for the energy reduction and XP increase benefit to Jobs.
 * Most people believe this strategy is only viable for hundreds of levels if the Fearless character type is chosen and a "friend" promotes you to be his Wheelman. This provides you the benefit of occasionally completing a Job for 0 Energy cost.
 * Only do as many high xp/energy ratio jobs as you need to ensure that you will reach the next level. Use tools like ExpEnergy to monitor your progress see when it is OK to do the low xp/energy jobs to complete your Job Mastery.

Advantages

 * A large Energy pool which can be used to complete more Jobs
 * Energy Pack refills provide a big bonus that can be used to gain lots of consumables.
 * Very fast to level and use up even thousands of points of Energy

Disadvantages

 * Little to no points in Attack or Defense makes Fighting more difficult. As a result, you will focus most of your attacks on players with much smaller Mafias.
 * XP per skill point is less than an All Stamina character.

All Stamina Character
This 'All Stamina character utilizes a similar strategy but focuses on winning Fights rather than completing jobs. The strategy became viable when Zynga lowered the cost to purchase Stamina from 2 skill points to 1 skill point.

Strategy
The focus of this type of character is to put all your available skill points into Stamina and concentrate on Fights which provide an xp / stamina ratio of approximately 2.47 xp per fight won.

The goal is to be able to reach the next level without running out of Stamina. Upon leveling, you will get a free Stamina refill and can continuously level.

Critical Success Factors

 * Find a whipping boy. Since you won't be investing any points into Attack or Defense, it's important to find a player you can beat who has a smaller Mafia and/or lower equipment score that you can beat consistently.
 * Download a bookmarklet similar to AttackX which allows you to attack the your whipping boy hundreds of times in a row.
 * Save your small pool of Energy to do the largest Job possible before leveling up. Since Fighting typically only gives you 2-3 points on average, a Job that provides a larger XP bonus is more beneficial for your final levelup action.

Advantages

 * Each time you fight, there is a small chance to win a piece of Cuba orNew York loot (depending on level). Since you will be attacking hundreds of times per level, the quality of your loot will typically be much better than other people at a similar level.
 * The 2.47 xp return from Fights is much better per skill point than even the best Jobs

Disadvantages

 * The small pool of Energy makes completing Jobs and progressing through the game (particularly Moscow) much more difficult.
 * Utilizing hundreds and thousands of Stamina points is very time consuming. So while leveling is continuous, it is not done quickly.