Tiaral

Revan, does combat strength somehow affect local quests?

Combat strength is a General indicator of the strength of the available clan warriors; it takes into account both the number and individual strength. In other words, this indicator can be used to determine how strong the clan's units are, how many of them there are, and the strength of the characters in local quests. Mercenaries are not taken into account.

Can the entire group be summoned for these quests, or not?

It depends on what you mean. If the question is about all 18 mercenaries on one quest, then yes, it is possible. If it is about those who are present in the region (that is, for two different quests), then it depends on what these quests are (for example, a global quest may be before a local one, or they may be carried out simultaneously).

In the second case, will the details be available only upon arrival?

The details of the quests for these 5 recruiters will be available only upon arrival.

Will the traveler's quest still "expire" if we decide to take a local quest for two people from the Hand clan?

I don't understand the question. If you are asking whether her quest will be available later if it is not taken now, then this is unknown. It may expire, or it may remain available.