Saturday's 1-1 draw with Oxford extended the Shrimps' unbeaten run in the league to three matches but, after seeing his side ship a late equaliser, Bentley cautioned that they were in a relegation battle.
The manager's words came despite the fact Morecambe sit 16th with 27 points - nine above the drop zone.
"I think it's a sensible way of looking at things," Roche told Press Association Sport. "We've got to get to the points target which he's set at 50 points.
"Once you get to that I think you can start looking up the table.
"We know how well we could do if we start to find a little bit of consistency but, first and foremost, we've got to try and get to that safety marker.
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