I would do option #3 instead of taking only a partial team further and leaving some behind, especially if you're going to have to do the 2 alone. Not only will you be keeping the team together, getting another team, but you'll also gain a whole bunch of rested experience for all 5 of them while you're waiting to get the last 2 accounts upgraded. Leveling with max rested in wrath is MUCH better than doing it without.