Thank you for that I have been testing it right now and trying to get the full articles at once through the rules if any, unable to find a solution yet, will search further if I could get the full articles at once for offline reading

Update: Unable to get the full article. other than the original page view

Followed the following info, it doesn’t always work

Convert Partial Articles in Feeds to Full-Text Articles

Feedbro has built-in engine for transforming partial text feed articles
 to full-text articles. This feature is not automatically on for all feeds 
and must be enabled per feed. 
To do that, right-click the feed in the feed tree and select 
Properties. Then use "Feed Entry Content" for adjusting full text 
extraction settings. Click "Preview" button to check that 
you get desired results and then press "Save".

Note that obviously full-text option should not be used 
if the feed already 
provides full articles. Also the full-text conversion doesn't 
work for all feeds and sites but it works pretty well 
for majority of sites. 

so far the only one which has been suggested is Chaski is the one I like ,

but you need to be online to retrieve the full article one by one first, then it lets you read the full article offline

Nothing like a podcast player which always downloads the full article, to be read offline