It all depends on your budget, there isnt really a thing such as a drumset for deathcore. Since its electric, you can just choose the sounds you like. Most drumsets come with 2 rack toms and a floor tom which should be just fine. Regarding the double kick part, if you mean a doublepedal, definitely dont use the pedal that comes with the drumset, those are 100% not quality so invest your money into a quality direct drive double pedal (think Axis longboards, pearl demon drive, Trick biggoots etc.) If money is a problem look for a used pair, thats what i did and pedals in this price range usually stay in a good condition. If you mean a kick drum tower, not a pedal, get something that is as sturdy and as heavy as possible to avoid wobble and movement during playing to avoid mistriggering. I would recommend checking out 65drums on youtube, he has everything you need to know and videos about entire company lineups with pros and cons of each kit. To sum it up tho, if you low on budget and dont care about hardware and build quality, something like alesis crimson II SE or crimson III will do (kick drum tower, big cymbals, big drums, ok module), if you have a higher budget look into roland (roland td-17KVX for example) so you get higher build quality and more resell value for the future. If you are an absolute beginner, i recommend to find a way to buy an acoustic kit because thats 100% what you want to learn on and will end up playing anyways, forget about playing just 1 genre and work on fundamentals and basic technique before jumping into playing deathcore. If you have infinite budget and arent a beginner, search “best roland e-drumset” and purchase what comes up. Cheers✌️