Generally speaking I would stay away from extra power extractor springs, unless there is something wrong that would require it, such as e.g. rough chamber surface, if using extra power extractor spring it is important to check that you do not get problems with feeding. Usually they require good magsprings as well because it has to push the case with more force up from the mag in under the extractor (extractor has to move out of the way a tad).
In your case, most likely a stronger extractor spring will have no positive impact on the extraction. You extractor is most likely already bottoming out on the extractor depth pad that contacts the extractor slot in the slide.
What you need to do is to gently remove some material from the extractor depth pad to allow for the extractor to move in deeper and thus being able to apply some tension to the case rim while it is being extracted.
As it is now your extractor slips of the rim when the case rim is moving away from the extractor before it is stopped by the opposit side of the breach face.
The extractor depth should be such that it has to move out just a little bit when the case rim is slid up under the extractor.