>>17692824The problem with Drifblim's set is that its attacking moves (except for Explosion) are telegraphed, meaning that your opponent can just switch in their Rock/Electric/Steel/Dark/Normalt type before Drifblim actually hits something.
An all-out attacking set isn't a good idea for Drifblim either, since it doesn't hit that hard without a boost and isn't that fast. Basically there's a ton of other Flying and Ghost types that can do that set better. What Drifblim can do very well is boost and sweep with its Unburden ability, and there's a lot of ways to trigger it.
For instance, Drifblim could carry a Chesto Berry and use Rest when it's low on health, recovering all its HP and doubling its speed in 1 move. Weakness Policy takes advantage of Drifblim's 5 weakness, doubling its attacking stats and speed when hit super-effectively. You could even put Destiny Bond on an Unburden set to get an almost-guaranteed KO.
Besides that, you should probably replace Energy Ball on Gardevoir. It doesn't help you take out the Poison, Steel and Fire types that resist Fairy. Instead of Miracle Seed, give it Pixie Plate.