Level 27 wonder Golem with MS/SE
CP too high for prestiging, a slightly worse Rhydon on attack but how about as a diversity defender (at level 30, she would be CP-viable in my area)? I have 260K stardust and 133 candy.
Answers
As a defender, Golem isn't that great. It is ground + rock like Rhydon, but with less CP. Ground and/or Rock pokemon as defenders are only as good as their CP because almost everywhere, water or grass pokemon are easy to obtain. Whether its Eevees that evolve into Vaporeons, Exeggutor or anything with Solar Beam, Gyarados with HydroPump, there are plenty of accessible pokemon to make short work of any rock/ground type. If your Golem had Rock Throw + Stone Edge, it would work well as an attacker against Dragonite and even Gyarados since none of Gyarados' quick moves are water. But with your scenario, I'd save the dust.