Is it worth the effort to try to increase my credit scores?

That depends entirely on your NEED for better credit and scores and of course on how much of an effort it will be.

Some people get lucky, they send out one round of disputes and while the results may not be perfect, the scores are substantially higher.   But that's very unlikely if you have 8 charge-offs and 10 collections.

Others go through 2 or even 3 rounds of disputes and then their only option is to sue or to live with their credit.

If you are a typical subscriber with several unpaid charge-offs and collections, you have quite a bit of reading to do.

Sometimes it may seem like I do MAGIC - one seemingly unimportant date is added and the score goes up over 80 points.   But often the credit bureaus simply ignore factual disputes.  I don't recommend disputing the same thing over and over.  The CRAs classify the disputes as frivolous and it becomes a waste of time.

If you have RECENT charge-offs, you have to be very careful and make sure you don't dispute and then get the summons. 

At CreditFactors you'll find lots of info on avoiding being sued and what to do if you are sued. 

You can post questions about your accounts or ask for general guidelines at the CreditFactors subscriber forum.  It's not personal consultation, but I'll try to point you in the right direction.