Magcargo

There isn’t a place for Magcargo to exist in the current meta. Water-types are very common. Rock Throw + Stone Edge can be a good moveset to take down Flying-types like Charizard, but Magcargo is outclassed by Pokemon with higher stats like Golem and Rhydon.

Best PvE Offensive Moveset

• Incinerate pairs well with Overheat to fulfill a Fire-type role.

• Rock Throw has synergy with Stone Edge for Rock-type DPS. 

• Ember falls slightly behind in performance, but not by much. 

• Heat Wave is a poor move. 

• Rock Tomb is inferior for offensive DPS. 

Best PvE Defensive Moveset

• Incinerate is very strong on defense with its huge base power. 

• Rock Throw does 25% more DPS than Ember, and does neutral damage against Magcargo’s biggest counter, Water-type.

• Rock Tomb is the only multi-bar Charge Move available, making it the best choice for defense. 

• Stone Edge hits fast and hard with STAB, but as a 1-bar move Magcargo might faint before it can use it. 

• Overheat and Heat Wave are too easy to dodge, and have poor defensive typing.

Incinerate + Overheat and Stone Edge or Rock Tomb

The addition of Incinerate following the GBL Season 10 update is an improvement for Magcargo, improving its energy generation and allowing faster access to its powerful Charge Moves. Ember is generally considered an inferior option due to its lesser energy gains, though its faster animation makes it easier to use and it sports slightly more damage output. Rock Throw can be chosen for Rock-type coverage instead, though this is more niche. 

Stone Edge and Overheat tie for the same energy cost, and both threaten significant damage with STAB if unshielded. Unfortunately their energy costs are moderately high, resulting in poor shield pressure, but at least they're better than Heat Wave. Rock Tomb's inferior damage output and slightly greater energy costs are discouraging, but since the energy difference isn't much, the potential to bait shields while applying its debuff could prove useful in niche situations.