We are on cooper, and I should have enough XP for a monster upgrade to silver after the next dungeon, however given that I have 33 and the heros 48 so far after then next dungeon there is a fair change that the hero will be on about 70/80 and I will be on about 40/60.
So my query is if I upgrade 1 class to silver there is a fair chance we will be moving to silver campain shortly afterward. and I assume that the class I upgraded to silver stay silver when we enter the silver campain, and dont get an automatic upgrade to gold, because they have already been upgraded by 1 level.
Is it worth spending 30XP on a silver monster upgrade that I will only get 1 or 2 dungeons out of, or better to buy treachery, which will get me cards for every encounter/dungeon.