You just need 775
for /var/www/html
as long as you are logging in as myuser. The 7
octal in the middle (which is for "group" acl) ensures that the group has permission to read/write/execute. As long as you belong to the group that owns the files, "myuser" should be able to write to them. You may need to give group permissions to all the files in the docuemnt root, though:
chmod -R g+w /var/www/html
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