>>7289275The Arcueid in Fate Extra is Arcueid without planetary back up (i.e 7.5% Arc), and her stats are like this: STR B+, CON C, AGI B, MGI C, LUC D, but since she is a Berserker, she has rank C Mad Enhancement, which raises her all her stats for 1 rank except MGI and LCK. In order to get B rank in stats you need divine/dragon blood, while C rank is superhuman. So yeah, at 7.5% she is still Servant level.
Arcueid's true power is her 100%, Gaia just restricts her in order to prevent her power from running amok, since at full power she has the strength of around 17 Servants, meaning that she can she can pull off attacks on the same level as Excalibur or higher without breaking a sweat.
And by the way in F/E she is still stronger than the other Servants, since the other Servants are recreated using the laws of the Moon, meaing that they perceive the Moon's gravity as normal, while Arc forces the gravity of Earth on her surroundings, so they are placed under 6 times the gravity when before her.