if you need more points, then you should totally do this deal. the way deng is playing, he's looking like the luol deng who owned the heat last playoffs. but blocks and rebounds belong to the bynum/lee duo, so it really depends on what stats you need.
as for josh boone or anderson varejao, i'd say pick up varejao. boone is too up and down for him to be a reliable fantasy option. from varejao, you could at least expect 8 points 8 boards a steal and a block per game, without really taking too many shots.