—Opening Narration, New Mystery of the Emblem
—Opening Narration, Mystery of the Emblem
Subjective: The following part of this article is based upon the editor's personal experiences and opinions, and therefore may not be applicable for all readers.
You should immediately recruit Sirius on turn 1. It is advisable that the group consisting of Ogma, Yuliya, Jubelo, and Sirius should simply defend the village where Castor resides until Marth and the others can join them, as Group 2 simply does not have the manpower to assault the castle, and bandits may attack the village in their absence.
Using Yuliya's Rescue Staff on Ogma can be a good idea as Ogma will have to take at least 3 hits, should he have recruited Sirius (if Ogma recruited Sirius on the tile directly below the bridge, he'll take 3 hits, if he recruited him in the forest, he'll take around 4 hits). Should you use this method, have Sirius take out the Hunter below the bridge to keep Yuliya safe. This method should only be used on Maniac or Lunatic difficulties, as Ogma should be able to withstand 3 hits on Normal and Hard (especially in New Mystery Of The Emblem, should he be used in the Prologue).
On lower difficulties (Normal and Hard), using the Rescue staff on Marth to recruit Castor on turn 1 is not a bad idea as Castor and Jubelo together can reliably kill the thief attacking them (also, it makes keeping "Group 2" alive a lot easier).