I'm a terrible strategist so if I come up with an awful plan you'll know why.
First off, how high are the barricades? And how is the MXL hooked up to a hose? Is the cap modded or something?
I'll assume that the barricades are about 3 and a half feet high, and the MXL's cap is modded.
I would get everyone except the scout to hide behind the barricades to bluff the opponents into thinking he's the only one there.
If they fall for the bluff, hopefully they'll use up a WBL shot at the scout, and while he's reloading, everyone will jump up and quickly try to take out the WBL user as fast as possible. Then go for the Vindicator users. The rest of them will be pretty easy to outdistance, especially from higher ground.
If they don't fall for the bluff, the scout will then tell everybody, and the whole team will split up and try to flank the opponents from both sides while staying on the high ground. Everyone will mostly focus on taking out the Vindicators. The WBL user can only shoot at one person at a time, and when he does fire he'll have to reload, and then he'd be vulnerable. Although everyone will probably defend him while he's reloading, most of my team should be able to outdistance all but the Vindicator users, who, if my team does it right, should be mostly eliminated. When the WBL and all the Vindicators are taken out, the rest should be easy cheese.
The FF's would only be dangerous at close range, but most of the team's blasters can outdistance them, so we would never have to get close to them.
This may not be the best plan in the world, but it's what I would do in real life, cause like I said, I'm not the best strategist.
Oh by the way, in both scenarios, the MXL would be kept out of sight until the team attacks. The scout would then man it, and try to take the opponents out. If he can't reach them with the MXL, he can take the hose out and use that. =PEdit:
What the... Where did your post go Typhoon?Edit #2:
Oh I see. Never mind.