hi guys,quick question. my titan is sagging a bit too much. word on the forums is that i need back up springs or just get plain air bags suspension. please any tip on which is better.

make it beefier... bags are generally completely worthless

That's a little new to be sagging, don't you think? You could have the springs re-arched, or get longer shackles. Helper springs would work, too. But I would do one of the first two things listed unless you plan on hauling weight, then helper springs might be right up your alley. IDK if the helper springs would actually bring it back up without getting the leafs re-arched first. Just a few ideas off the top of my head. I would just get some longer shackles because it can't settle too much farther before running into the overloads. What if the re-arched springs just re-settled?