I'd really like to do the mission that way, mainly because it's so goddamned epic, but we really need for it to make sense.
First point, sure Lexhur will become a major help, but there's a huge difference between trusting characters like Shannon to work alongside you immediately following the mission where she was an enemy and trusting a goddamn train engine on tank treads who is a fucking Ruin General to work with us without being a little nervous about it.
Secondly, Mission 3 is going to be a rather large scale religious gathering breaking down into a riot. Innocent bystanders 'n' shit and chaos will be all over the place.
Then here comes Impact and Pierce on the PATCAmobile, shelling artillery on the screaming crowd and grinding people under its massive tank treads. Faynoc freaks and Paradigm Shifts into a Lugia and takes flight and tries to flee, which leads to a high speed chase through the city. Cars and people are getting knocked aside or crushed as you two and Lexhur destroy numerous buildings and other shit trying to hit Faynoc until it ends in an epic battle with his personal bodyguard Mio when she jumps onto the train.
So, after Renny's sidequest, we've gotta focus on two problems with that. First, we've gotta get Rayleen to okay that notion.
...You may wanna bring some of that wine from Renny's house. Actually, a lot of that wine. Then maybe...
Impact:
"So can we take Lexhur with us to go kick the shit out of Faynoc?"
Rayleen:
"I'm the King of France!"
Impact:
"So I can take that as a yes?"
Rayleen:
"Oh, Pierce! I want your cock!"
Pierce:
"Well, I'd give you Blaziken but I think I'm going to really need him this time."
Impact:
"That's not what she means."
Rayleen:
"I want my baby back baby back baby back baby back baby back ribs..."
Impact:
"Huh. I guess that is what she means."
Secondly, and more importantly, we've gotta make certain there won't be innocents who can die in horrible, horrible death because of your actions. In other words, if somebody else were to sign some sort of contract...
Pierce:
"Renny, we need to talk about something."
Renny:
"Not right now, Pierce. My Mollesk's Pokeball is missing."
Pierce:
"Uhh, Renny. Look over here."
Renny:
"Oh my god! Impact, get that gun away from Mollesk's head!"
Pierce:
"I'll call 'im off...just as soon as you sign this little piece of paper."
Renny:
"Sign? Wait, what is this?"
Impact: *starts to squeeze the trigger*
Renny:
"Wah! No, please! I'll sign it, I'll sign it!"
*Renny signs the form and Pierce takes it.*
Pierce:
"This all seems to be in order. Impact."
Impact:
"Got it."
*Impact shoots Mollesk dead and then shoots Renny dead.*
Renny:
"Ugh...tell Lola...that I stole a pair of her lacey panties..."
Pierce:
"Impact, you were supposed to release Mollesk."
Impact:
"Your definition of 'release' must differ wildly from mine."
Pierce:
"Why'd you kill Renny?"
Impact:
"Why do you fucking think?"
Pierce:
"Yeah, that was pretty rheutorical, wasn't it? Well, let's go get Lexhur and head on out. Oh, do you think we can take a few detours?"
Impact:
"Eh, why not."
*At Renny's house*
Pierce:
"Oh, fuck!"
Impact:
"What is it, this time?"
Pierce:
"I came here to take those panties Renny stole from Lola for myself, but then I just remembered that Renny's MILF is here and I forgot the Snorlax costume."
Impact:
"Forget about her, man. We've got fucking Lexhur. We're gonna be hookin' bitches up like Voltron 'n' shit."
Pierce:
"I guess."
*At a McPoke's Drive-Thru*
Gardevoir:
"Welcome to McPoke's! Could I interest you in a-what the fuck is that thing!?"
Impact:
"I want some waffle fries for free, bitch!"
*They drive off, laughing maniacally*
Manager Alphonsine:
"Who the devil were they?"
Gardevoir:
"What I'm more concerned about is how they somehow got underneath those eight 'n' a half foot tall clearings on that monster. Wait, how did they even get into the drive-thru lane to begin with?"
Armored Bishoujo:
"Then it more or less becomes like the Night at the Roxberry where Impact and Pierce are riding along, banging their heads to 'What Is Love?' by Haddaway."