My Marowak will have Shadow Bone, Bonemerang, Rage and Flareblitz with Rock Head. And I would like to see if it's a viable strategy to have a skill link Pokemon attack him after he's used rage.(because you'll be +6 or close to that in one move much like the beat up strats) Due to his poor speed and the few Pokemon that get a combination of multi strike moves, trick room and skill link that might be slower than Marowak, I'm kinda at a loss and don't really know what Pokemon would be good for the strategy. (so far I could could only come up with gourgeist and toucannon) If you know some other good/common rage Pokemon combo's I'd like to hear about those too.
The best way to use that strategy is to use a pokèmon that have an ability that do the same thing, we all now what terrakion and whimsicott do. Using rage you waste a turn and deal damage to marowak, it's better using a redirect Pokemon such as clefairy and give marowak sword dance like others have said. In short try something like: Marowak-Alola @ Thick Club Ability: Rock Head Level: 50 EVs: 252 HP / 180 Atk / 76 SpD Brave Nature IVs: 0 Spe - Flare Blitz - Shadow Bone - Swords Dance - Protect protect because I think you want to play on doubles and protect on marowak is necessary.