It is not essential to have contact - but you will miss XP for the following quests =>
Duke's murderer (a quest given from a ghost)
Duke's murderer (the quest given from Com. Ralph => invitation to the castle.) An invitation is vital for the main plot, but you have 3 opportunities to gain them => 2x from Ralph (plague/murderer - and 1 from Gen. Alix/Mitox, after helping to erase the orcs and their water supply well)
Killing XP => as you erase the assassins <img src="/ubbthreads/images/graemlins/winkwink.gif" alt="" />
