You're going to make the choices, not me so I'll say one more thing and be done with it....

Think about who JO is. Think about where Mesa stands right now. Think about why he's offering anything at all in this TA. It's only so that in the end he will get more out of you for less money.

Block or better is becoming more or less an industry standard at the regional level and any arbitrator will give it to you for little or no loss elsewhere.

PBS with zero restrictions will have you sitting 2-3 hours every time and doing 7 legs with min rest overnights every day of the month. Starting at 6am and finishing at 9pm. Think about that for a minute. There would be nothing to stop it or bid around it. Kiss your 2 1/3 more days off goodbye if you commute.

JO would not agree to block or better unless he knew he could take it back again with PBS. I would never agree to PBS, and especially not at Mesa. Best of luck to you regardless.