What weapons to choose first in ShadowGun DeadZone?

[lindbergh]

Selecting the best weapon is the key to success in ShadowGun DeadZone. If you choose the wrong set of weapons, you might find yourself eating dust over and over.

Here are the weapons that worked for me and helped me kill tons of enemy players online:

You should try to earn money to purchase the following:
Mace - if you're just starting, this shotgun could help you get a few kills. It does not need you to be good at aiming. Just get up close and shoot.
Big Boy and Agony - these are machine guns that are very effective up close and long range.
Health pack - health packs are great because they give you a health boost. You need to purchase one of these early in the game.

I don't really like snipers because all you do is wait wait wait. Rocket launchers are the strongest, but they're limited when it comes to ammo.

What are your suggestions?