Pistons general manager Jeff Bower sat in the stands at Air Canada Centre during Wednesday morning’s shootaround, using his phone. There’s no time for Words With Friends; he was doing some online shopping — perusing possible deals and making and taking calls about other roster possibilities. It’s that time of year again. With Stanley Johnson (hip flexor) sitting out the shootaround and Luke Kennard (thumb) and Avery Bradley (groin) going through it at less than 100 percent, Bower continues to look at options, but until something good comes along, the Pistons will continue to try to make it with their own depth. That means no deals. At least not yet. Depth was supposed to be one of the strengths of this group — and it has been their saving grace in the first half. With the additions of Reggie Bullock and Anthony Tolliver, who were the leftovers in the 3-point-shooting bargain bin of free agency, they’ve been able to tread water somewhat. Both were under-the-radar signings last summer, with the mid-level exception and bi-annual exception to augment a roster busting at the gills near the luxury-tax line. It’s just turned out that they have provided some of the best value because of their relatively inexpensive contracts, compared to their production in the first half of the season.