Yes, they are. bellaluna linked you to the chart so that you can see how much of a difference language test results make to your score.
Obviously, the difference between CLB 7 and CLB 10 has a big impact on your CRS (an extra 118 points, in fact). But if you've already maxed out IELTS results, there aren't easy ways to increase your score (except PNP).
That's why some people are in the pool for so long.
dan_and said that because this is the first time you've mentioned your CRS; until now, we had no idea what you were working with.
That said, though, increasing your CRS by that many points is a lot harder than you seem to think.
At the moment, 450 points is not enough; the cutoff is 482+ at the moment. It will probably drop in the future, but no one knows when or by how much.
500 points will definitely be enough, if you can manage it.
Then I think that the only possible way is to convince someone to give me a job. How effective is the job bank? Are people able to find any jobs using the portal?
Then I think that the only possible way is to convince someone to give me a job. How effective is the job bank? Are people able to find any jobs using the portal?
No.
It is exceptionally unlikely that you will receive a job offer before you have PR.
For an employer to offer you a LMIA-supported job, they will have to prove that there is no one in Canada capable of doing the job.
Absolutely not.
Getting a job offer is next to impossible.
Getting PNP is quite simple, if you qualify. It's just a matter of applying, sending you documents, and waiting. Read through this forum, and you will see a vast number of people who have PN.
Read the eligibility requirements, find which Provinces you're eligible for, then read those Provinces' application guides: http://www.canadavisa.com/canada-immigration-discussion-board/express-entry-expression-of-interest-b54.0/