Well, its a choice you have to make, early end-game gear (iLvl 70) are relatively accessible and players are able to easily gear all of their armory classes in iLvl70 to get up to speed with early end-game content but this obviously comes with the drawback of sharing a single lockout for higher end gear as part of the armory system.
If you primary objective is to defeat the weekly lockout for higher end content, you'll have to put in the effort and time to level an alt character
Its really not that difficult to understand unless what you want is simply to get the best gear right now
p.s. if you're mainly interested in gearing your secondary class fast, you could get a static coil party and establish loot distribution so that you can get the pieces you need for your secondary class even when you aren't running coil with that class.
