The striker, who nearly left the Baggies in the summer, feels the squad at the Hawthorns is strong enough to avoid relegation following an upturn in form during recent weeks
The Midlands outfit parted company with the Scot on December 14 after a six-match winless run left them languishing in 16th position in the Premier League.
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"We don't need freshening up," Long told the Birmingham Mail.
"We have near enough 25 players. We have six or seven options up front. We're covered everywhere. Steve Clarke did well, he brought in good options.
"I think we're good enough to get into that top half of the table - hopefully get some points over the next games and get back up there.
"We're optimistic of staying up. We're definitely good enough. We have a big squad, with lots of competition for places.
"We've had a good Christmas period. We have got to take confidence from that."