Gao Guang's preparations involved being ready to act in Georgia at any moment to take control of Pavel's arms shipment.
Since the boss was interested in Pavel's estate rather than his arms in Georgia, Gao Guang had to act on his own. However, the Georgian action depended on the success of the London operation.
One move could set off a chain reaction, or rather, only if the operation in London succeeded first would the situation in Georgia fall into place naturally. If the operation in London failed, an assault in Georgia would not be feasible.
Twenty billion US Dollars was a huge fortune, and arms worth twenty billion US Dollars constituted a large supply that couldn't be transported in just a day or two under normal circumstances. So even if the guards of the arms could be eliminated, it wouldn't be possible to take away all the arms.
However, if Pavel were captured alive, then Gao Guang's side would only need a few people to peacefully receive the arms.