What is the best Pokemon team to beat the Pokemon league in Pokemon platinum?

well i used torrtera lvl 83 moves frenzy plant, giga impact, earthquake and cut (did not use cut at all)

gyarados lvl 61 moves waterfall, surf, ice beam and fire blast

giratina lv 58 (origin form my friend gave me a griseus orb with another Pokemon in a trade!) moves rock climb, earth power, defog and shadow force

rhyperior lvl 53 moves earthquake, flamethrower, thunder and rock slide

electrivire lvl 56 moves thunder punch, thunderbolt, iorn tail and close combat

and garchomp lvl 66 moves earth power, dig dragon rush and Draco meteor

NOTICE: bring lots of medicine like hyper potions and revives you wont need full restores or max potions they will get up to defeat lucian with this team lucian is not the hardest of the elite four but only the weakest! hope i helped