Meandering towards a draw, sadly.
If they get the full allocation of overs (allegedly min 16 to go), the 88 required means 5.5 per over. Not out of the question...
They've gone off early for bad light before in the match, so I would imagine that will come to the rescue if Worcs to decide to have a go. Might be the best thing for Sussex if they do - lose a couple of wickets and it'll look dicey for them!
EDIT: P.s. 22 runs off the last 4 overs = exactly 5.5 per over. If these two set batsmen hang around, it could well be close!