It's taking longer to get DFW nowadays- about 3-4 months now. Guys hired in Sep are now getting DFW for Feb.
It's about 8-9 months to holding a relief line, 9-10 months to hold a line in DFW.
You can get a line at a different base (say FLL) and drop the trips if reserve coverage is green in your base, and then pick up in DFW. The danger is that there is no open time to pick up, which has been the case lately. There is no open time to be had - it is all gone after initial open time. I was surprised even in FEB there was lots of open time available, and all of it was picked up.
Stuff that does tend to show up in open time are usually 2-day trips, and redeyes.
Relief tends to go senior, before reserve.
If you live in base and don't want to fly, you can always bid relief/reserve. It sucks to be a commuter on reserve because you will spend a lot of time getting a hotel room in your base.
Newhires are getting DTW/ACY out of training now. with FLL/ORD being the next junior, DFW then LAS is the most senior FO base.
Only holding reserve for 6 months last year, then bidding relief (but able to hold a line) for 3 months, and 3 months of training, I flew 150hrs last year (most of that within 90 days of completing training (Apr-Jun) - 50 hrs of flying between Jul and Dec.)