What are the most popular oaths that Space Marines make to make use of Squad based abilities, and which squad based abilities are considered the most useful for a squad of marines?

peterstepon said:

Regroup. Fire For Effect. Squad Advance. Tactical Spacing. Furious Charge. Strongpoint. Fire Support.
Also: Lead By Example (just to good, remember that the Ultra needs to allocate the re-roll on his turn and not as needed - to maintain game balance), Holy Vengeance, Sustained Suppression, Lightning Strike. Immovable Defence and Rally Cry.

Codex abilities are imho a bit better for defensive stances, chapter abilities seem to favour attack patterns.

Alex