Wordpress & Visual Composer - fix some issue with plugin, change some part and speedup wordpress website

Hi,
I have a wordpress website need to do some:
1- fix issue with Visual Composer.
2- Do some minor change with layout
3- speedup website.
4- Create blog part.

Believe after fix issue 1, the task 2 and 4 will be processed easily by Visual composer.
please find detail here.

https://docs.google.com/spreadsheets/d/1u_-kZPhSRLPZ83SkcnKjwN3MhIZGsc63vYBM-mmTcu0/edit#gid=0

Just Technical Assistant Tab
my website my website pixflows.com