Yea bro, 68 nobles (plus your 27 Saxon fellas) against the 152 of the realms that are actively involved in the war against Aurvandil, not taking on account any Astroist realm. Indeed in 1 vs 1 combat Aurvandil does fine, but thankfully you have been doing awful diplomatic relations.
Unfortunately, everyone has their own interests. Some end where others begin, and that might spell victory for the Southrons.