Oooooh this is FUN! I gotta have a go.
Gridcog would be a minor raid boss if there ever happened to be a raid centered around Bilgewater Harbor as that is where he lives and works as a low end mechanic. He does have aspirations of rising up to an important Foreman for the Bilgewater Cartel. And that is what his fight would be based around.
He would probably be one of the early bosses.
The boss arena would be centered in a construction zone, where Gridcog is bossing other mechanics around, yelling at them with a crackling and whining megaphone, just to hammer in the obnoxious bossing. "Move that! Over there! WHO SAID YOU COULD STOP?! GO GO GO!" etc
Obvious item of importance in this encounter would be a nearby oil pipe, which are common sights around Bilgewater Harbor. This big ol’ pipe being held up by a single support beam. Hmmmmmm.
When the party enters the construction zone, Gridcog will look over at them from the top of the scaffolding and yell at them through the megaphone:
"HEY, WHOA! This is a restricted area! Who the… Wait! AWW NO! You GOTTA BE KIDDIN’ ME! It’s the intruders! I- uhh- Well! Don’t just stand there! GET IN THERE! The BOSS is gonna have my head!"
Gridcogs underlings then begin swarming out of the nooks and crannies of the construction yard as trash mobs. The ones above rain nuts, bolts and wrenches down as AOE attacks that must be dodged. The aim of the phase is to deal with the trash while at the same time damaging the Oil pipe that stood out, as it has an HP bar and all. When the party has managed to bring the pipe supports HP down to zero, Gridcog will say the following line:
"Wait… What are they doin’ to my- WAITNO STOOOOP!!! NOOOOoooo!"
As the line plays, the pipeline will crash down from its supports, breaking apart and spewing oil all over the battlefield. Gridcog is fuming up on his perch as he yells through the megaphone:
"That DOES IT! That’s gonna cost me my BONUS! SECURITY! SECUUURITYYY!"
A huge ogre explodes through a part of the scaffolding, sending goblins flying with comical screams. The ogre roars and charges into the party, forming a long AOE warning bar, telling players to dodge this initial charge. Afterwards, the battle actually begins, with the Security ogre performing occasional leap attacks that cause heavy damage to those caught in under it. Eventually though, the ogre will go down and Gridcog groans into his megaphone.
"Yer really gonna make me come down there, huh?"
The goblin digs out a remote from his pocket and while holding it up says:
"I gotta say… You’s guys really screwed up my whole operation here."
A very prominent CLICK sounds as the goblin presses the big red button on the remote and finishes:
"S’only fair I SCREW UP YOURS!"
A massive goblin shredder rockets down from the sky and crashes down right in front of Gridcog, who jumps into the mechs pilot seat and for his first move strikes a rain of sparks from the ruined scaffolding near him, setting the oil pools around the arena ABLAZE.
The shredder shudders into motion as it begins advancing through the flames and Gridcog yells: "THIS IS FOR MY BONUS!!!"
The final battle with Gridcog is actually very straightforward, aside from the randomized, flaming oil pools that make positioning a little tricky. The shredder is a very basic lumber extractor type, only super sized and made tanky by several additional layers of scrap that have been riveted on the mech. At this point Gridcog is still very cofident in his mech and brags through the speakers of the mech: "My baby’s FREAKIN’ INVINCIBLE! Ain’t no way yer little toothpicks gonna get- wait, NOT THERE!"
And right on cue, as the damage piles on, the scrap plating begins coming off and as it comes closer to its eventual critical shutdown, the mech begins speeding up. The shredder attacks faster and faster and performs a devastating singular whirlwind spin with its sawblades shredding everyone around the mech.
Once the shredder reaches its last bits of health, Gridcog will begin yelling incoherently from the cockpit:
"Look! UHH! M-MAYBE WE CAN COME INTO AN-" something explodes in the cockpit "OWW! AGH! LOOK! WE CAN WORK THIS OUT! LET’S MAKE A DEAL! WHATEVER YOU-"
At this point, the goblin will be saying all sorts of pathetic things and will get cut off the moment the shredder hits zero. One of the shredders rocket jets malfunctions and begins pinwheeling the massive mech into the sky as Gridcog shrieks his last lines over the speakers while getting further into the sky.
The goblins last line is "MY BOOOONUUUUUSS!" before the mech explodes in the sky and then comes crashing down into the middle of the arena, where the loot chest will appear, in front of the smoking wreck.
RIP
That was so much fun to think up!