Now that I can read it......
It's a little difficult to understand the question but if I'm reading it correctly...you shouldn't be adding someone else to relationships that already are having problems. A new relationship might mask the problem for a time but it will eventually come back even stronger than before. Work on the problem at hand first so it can be banished then work on adding someone else.
There are as many ways to do polyamory as there are people practicing it!