I'm currently at the end of Act 2 on Dragon Age 2, and am getting utterly stomped by the Arishok and his personal army in the final battle in the Keep. Looking it up, I found that both Isabella and Fenris can make this fight significantly easier via certain story elements, but issue is I somehow managed to completely miss getting both companions. Given that there is no way of getting either of them at this point, I'm debating simply starting over and getting them, or dropping the difficulty for that one fight. Opinions?