I'm not familiar with how points distribution limits and such work with Fire Pro Wrestling, but from what I've read, I believe it would be best if Goblin Slayer had a very simple moveset, that is, mostly using kicks and punches while either being good at not getting winded easily, or on getting back up from disadvantageous situations quickly since that would fit in with his character as can be seen in both Year One and in the normal chapters, especially during the Year One farm raid and during the Sewer Arc, these traits can be seen of Goblin Slayer getting back up when he should be clearly knocked out. I believe it would be best to make him super-aggressive while making him want to recover when his health gets below like 30% (I'm not sure how this sort of thing would get processed into the wrestler). From quickly skimming the guide before looking through the FAQs and edit guides, and not knowing how the rules of the competition work, I'd make the following suggestions:
>Style:Heel or Fighter
<Return Skill: Heel or Fighter
>Critical Ability: Striking
<Special Skill: Focus or Second Wind (preferably Second Wind)
>Special Moves: Mostly simple shit since Goblin Slayer only uses advanced tactics when cornered and otherwise sticks to the basics whenever possible.
>Affinity: Probably mid-high for basic movesets and maybe a high affinity for a simple but more breath-taking attack since this stat affects how much breath is used for an attack.
MMA movesets might be justifiable if only because most wrestlers don't have good defense against it.
Goblin Slayer should go in for a quick kill with lots of simple and quick hits, and only really "think" about his movesets if he can't get that quick kill.
Similarly he should only use bigger moves/big attacks when the enemy is stunned.
I'd say GS should be better at back grapples then front grapples, but then he shouldn't be using grappling much at all/in most cases he should be trying to escape grapples instead of countering them. Corner grapples are so-so since he has been known to corner an opponent and whip the shit out of them.
Taunts should be pretty low. Maybe 85% for no taunt at all, with any taunts that do happen mostly being for when the opponent is out of the ring or to otherwise "bait" them. First taunt should be something to represent his personality since he might use it if he wins.
I'm torn on Ukemi. Goblin Slayer isn't blessed by the gods so I want to say he should have none, but he also comes back from situations quickly so it could be a useful stat. Along with this I think he should mostly focus his time on recovery when him or his opponent is outside the ring, and have low priority for re-entering the ring/high priority for recovery if the opponent isn't being aggressive on him outside the ring. Basically I think he should not run out of breath easy/be focused on a lot of striking/kicking moves instead of grapples and such, with a moderate defense. Brawling/foul play moves would also not be beneath him since he would be more interested in defeating his enemy by any means necessary.
Long story short: Either make Goblin Slayer a Fighter style with good breath control, or a heel style with decent punching/kicking power. Viscous is also a potential build if you think you can make it work. Note that I don't know jack shit about making character edits.