Its good when you have pro because it only takes a few seconds.
I would say while you are changing you hide so you dont get killed.

hide its as simple as that I hate to say it but noobtubes is probably the fastest way to get pro. I usually don't die changing classes and the pro perk takes little longer than switching to secondary.

you can always do the claymore with c4 or just noob tube with dangerclose

You should just Lie down,hide really fast while its switching or something..

Just hide yourself when changing and get it pro, it really helps.

I do recommend you do not use this perk, as you will be mostly hated by other players since it is unfair with grenade launchers, but, if you want to get it pro, simply switch to your favorite class using OMA, and ALL YOUR KILLS WILL COUNT TOWARD ONE MAN ARMY, even if the class you switched for doesnt have OMA.

As a 10th prestiger i strongly recommend you do not use this (i personally vowed to never use this again) as it ruins the game and COD is a multiplayer experience so you got to respect other gamers.

To fully exploit the OMA perk you need the following:

A class with claymores, a class with C4, a class with tactical insertion and a class with blast shield.

you also need classes with stopping power, cold blooded, hardline and danger close pro.

Step 1. as soon as the game starts go to your camping spot, place 2 claymores, then switch to your c4 class, place 2 c4 1 in range of each claymore in order to amplify the blast, then switch to your tactical insertion class and place it round the corner from your camp spot, out of view.

Step 2: switch to your stopping power class with blast shield on,(or danger close if your n00btubing), proceed to kill the opposition until you are 2 kills from your closest killstreak(so at 3 kills for pred, 5 for harrier, 9 for Chopper gunner). The blast shield should be used only when a grenade or n00btube is fired at your camping position.

Step 3: when you are 2 kills from your nearest killstreak switch to a hardline class and get 1 kill to get your killstreak(this way you get the benefits of hardline whilst using stopping power for the majority of your kills.) I like to keep my hardline class until CG is achieved.

Step 4: if at any time the enemy get uav or air support switch to your cold blooded class until its gone.

Step 5: upon earning a killstreak switch to danger close pro before you call it in order to greatly increase the damage of your killstreak reward.

Step 6: throughout the earlier steps switch to the class you are currently using in order to replenish all your ammunition and equipment, and remember a max of 2 c4's AND 2 claymores can be out at 1 time.

happy gaming

:rolleyes:
and dont forget to play the objectives if you want to win the game!

at the begining of the match get to where u wanna post up and use claymorez to cover the doorz u can plant up to 2 claymorez when using OMA thatz what i do and people rarely ever get to me when im changing classez