its definitely doable but to me it comes down to a matter of is it needed or not and personally............. i say it isnt needed in the slightest, the team that is in my signature has been the team that has stuck by me from my first run all the way to present day (except ive since swapped swampert for a vikavolt) and each party member is set for offensive output with minimal setup moves except for calm mind on sylveon and bulk up on blaziken......... as for a mega idk which im gonna resort to once we get them in v13, probably mawile due to huge power sucker punch hurting like heck