What pokemon should i add to my team to beat the elite four

Question

my current pokemon

tortera lvl 79

staraptor lvl 74

dialga lvl 47

Answer 1

Empoleon any level higher than 50

Answer 2

add a honchcrow with the ability super luck, a gengar and a lucario

remember to level up, cause your level is just too low. remember to pack yourself with hp restoring items and full heals or even some full restores. I got a strategy if you want to read it

elite aaron-

use staraptor and keep using aerial ace or fly to K.O his pokemon, when drapion comes out, switch out to torterra, then use earthquake(it's super effective against drapion)

elite bertha-

use torterra to fight her. keep using razor leaf or giga drain or whatever handygrass type moves, you'll easily beat her with ease.

elite fint

use something that knows ground, rock or water type moves. just keep using earthquake to his fire types, then choose gengar to K.O his drifblim and use lucario for luponny

elite lucician

start of with honchcrow, keep using dark moves for every one of his pokemon except medicham and bronzong. destroy medicham with staraptor and bronzong with a powerful attack of somesort.

champion cynthia

kill spiritomb with you most powerful move(he is ghost and dark, so he has no weakness and psychic and fighting moves don't work) . kill garchomp with roar of time or a ice type, kill the others in anyway you want.

the elites kinda easy so work hard!