1) Nomite easy to get. Just do daylies and you get 14orc tags per day(10-20 mins depending on parties) . Leggionaire's tho need much farm doing the maps over and over again( you can buy it tho)
2) you will be able to buy any of the mythic matterials but they wont be affordable i guess
3) plush i think it will be harder farming the mythic
4) you need to do the quests before going for mythic quests.
5) If you could buy whole mythic price would be way higher. This way any player that plays the game much has chances