Keldeo

While not quite as offensively powerful as Terrakion due to the lack of a stronger Fast Move, Keldeo is an extremely high-performing Fighting Type attacker with a typing that may prove itself superior to its elder Musketeer in select raids. If you're lucky enough to have a good Keldeo, it's definitely worth the investment! 

Best PvE Offensive Moveset

• Low Kick and Sacred Sword is the way to go, period. No other moveset really matters.

Poison Jab has significantly better parameters than Low Kick, making it the preferred Fast Attack even though it lacks STAB. It also provides Keldeo with coverage against Fairy- and Grass-type opponents.

Sacred Sword is Keldeo's bread and butter Charged Attack, dealing reliable Fighting-type damage thanks to its low cost and solid DPE. Hydro Pump lets Keldeo tap into its other STAB, but it is incredibly expensive and is therefore unreliable. Aqua Jet is a much cheaper option, but it is also far, far weaker and isn't worth running. X-Scissor is a good move overall, but its coverage tends to be less valuable than Hydro Pump's closing potential. Close Combat is a wonderful move, but is outshined by Sacred Sword's reliability.