Yes you can apply for speaking too.I am just aim for the eligibility criteria, so for writing just want 6 and I'm okay with speaking. But if the scores won't deduce then shall I apply for the speaking EoR too? Because there might be chances of improvements
But my question is, will your score of L8, R6. 5, W6, S 7 help you to get crs points above 430?
Usually, people aim for 8777 in ielts and if someone gets 8 in listening and 7 in reading and are only short of 0.5 or 1 band in writing and/or speaking go for EOR.
I don't want to discourage you but if I were in your place I would have thought to reappear in ielts.
You can ask for suggestions from other members too.
All the best with whatever you decide to do.