If you are fortunate enough to own 2 Xboxs and 2 copies of LP2, or a boosting buddy, then this guide is for you.
Seeing as this game has almost been completely abandoned except for the odd weekend afternoon, you can easily boost Ranked matches with a boosting buddy or account.
1) SETTING IT UP:
Have the boosting account/buddy custom search a game of Elimination (you can also do Post Grab but Elimination is quicker to complete) on any map to your preference.
I highly advise that you purchase the Map Pack 1 or 2 (400MSP) as 95% of players don't own them and nobody actually likes them. I always chose one of the two to avoid anybody ever joining my lobby. You can do this on the shipped maps but it can be more of a hassle.
Don't play Ranked Matches at night time! You will ALWAYS encounter players on shipped maps at that time!
Join the lobby through custom search and wait about 3 minutes. If anyone joins the lobby and they aim to stay, have your main account leave the lobby. It'll give the impression that you won't have a full lobby and they will leave. Set Default Weapons to Long Ranged and have yourself equip a Plasma Gun II.
If all goes to plan uninterrupted, your game will start 1v1.
2) THE BOOSTING:
When the game begins, have the main account run to the other player (you might get lost at first. lol). Once there, get either above their character or behind them and aim for the head with zoomed scope with your Plasma Gun II, and headshot them.
The boost account/buddy will be able to instantly respawn afterwards. Try to get them to spawn back to the location you killed them. When they respawn, they will be exactly where they were before. Assuming your rifle is still aiming at their head, have the boost account/buddy fire one bullet (this turns off the spawn protection) and then headshot them again.
Rinse and repeat this action and you will eventually come to a point where the boosting account/buddy is low on Battle Gauge, meaning 1 more kill and the game is yours.
Each game can be as quick as 3 minutes!! 20 kills a game.
HOW TO MAKE A BOOSTING ACCOUNT:
Make yourself a new gamer profile and join live. You will be sent through a bunch of confirmation nonsense and email notices. After passing through it all, choose to join free month and you will be required to input your Paypal details, mobile/phone number. You won't lose any money and you can easily take away your Paypal records when the month is up via. Paypal then xbox settings.
PURCHASING A MAP PACK (2 for the price of 1):
If you are using a boosting account and have 2 Xboxs or can share your gamertag with a trust worthy friend, have the boosting account/friend buy a Map Pack on the Xbox where your real gamertag's memory is on. Once downloaded, get the dummy/friend to download the Map Pack again on the 2nd/their xbox in the download history. The rights go to the xbox it was originally downloaded on and also the gamertag that bought it, so anyone on your real xbox gets to access the DLC without needing the dummy/friend's gamertag signed in on the same console.
This method is perfect for getting your 1000 Online Kills done in the process, although this will not increase your Gunner rank unless you play against a higher rank than you (what a dumb concept Capcom...). Give it a shot! But I warn you, try to avoid the shipped maps as they are commonly played on by others. This method is bullshit-free stress-free but it can get repetitive, so take your time and relax. The game isn't going anywhere. :)
P.S. Don't assume you can boost your way up to Rank 1 using this method. Some people have hacked the boards before I even made this guide. I'm previously made it to Rank 19 on 2 Ranked Leaderboards and was blocked from progressing any higher thanks to them... unless they lose one game :/
Feedback is appreciated. Any questions I'm happy to answer. ;)