Hi,
This sheds more light , personally i think it would be in your advantage to do the employment assessment as well in case you do not make the 20 in IELTS, as of today the occupational ceiling is ,
[TABLE=class: table-100, width: 469]
[TR]
[TD]2335[/TD]
[TD]Industrial, Mechanical and Production Engineers[/TD]
[TD=class: text-align-right, align: right]1788[/TD]
[TD=class: text-align-right, align: right]1647[/TD]
[/TR]
[/TABLE]
So the faster route and planning the better , in regards to the career episodes EA provides an msa booklet with a lot of useful info on the process, it states ;
" A career episode is a documented component of your engineering education and/or work experience which captures a particular period or distinct aspect of your engineering activity. It needs to clearly demonstrate the application of engineering knowledge and skills in the nominated occupation, not the acquisition of knowledge
• an engineering task undertaken as part of your educational program;
• a project you have worked on or are currently working on;
• a specific position that you occupied or currently occupy (in this case, the career episode must comprise more than a mere duty statement);
• a particular engineering problem that you were required to solve.
"
So as long as it application of knowledge and skills it fits the bill.
In regards to the visa subclass i believe the opposite , that 189 offers more options , as you are not limited to that particular state for any amount of time as oppose to the 190, which may become handy in searching for jobs after you get the visa , and getting the visa does not mean you have or will work in that particular field of which the visa was granted .
Regards,