If you're looking for a quick boost in your defense stats, AND you've fully completed Bangkok, you may have literally THOUSANDS of Defense points available to you right now.
The key is the Xiamen Tiger, available only in the Bangkok Faction Store. The Xiamen Tiger has a 52-defense and is the strongest defensive animal that you can buy. More likely than not, each Xiamen Tiger you add will increase your defensive stats by 20 or more points.
But... at B$550,000 each, the Xiamen Tiger is expensive. I've been collecting on Bangkok properties and buying one each time I get enough Baht.
Today I took a different approach.
Remember that Bangkok was initially unique in that the weapons, armor, and vehicles you needed for each Episode were used ONLY in that episode. Hence, except for the ability to buy more Satellite Phones, many players wisely sold their inventory from completed Episodes to free up money for purchases in new Episodes.
Leave yourself ONE job to do in Bangkok on the off chance you need to make some Baht in a hurry. You'll see here I left myself the ability to do the job that gets the Titanium Katar weapon, a 50-defense item. The rest of your Bangkok inventory should be SOLD.
You may free up millions and millions of Baht - especially when selling items from the later Episodes - to buy Xiamen Tigers. I sold ONLY items from Episode 7 today and bought nearly 40 Xiamen Tigers - and took my defense up almost 1,000 points in the process.
Just make sure to leave yourself ONE job you can do in Bangkok (preferably one with a loot drop)... you never know when Mafia Wars brings something back that you thought was done forever (anyone feverishly collecting Gun Drills and Car Lifts this week??)
Give it a try!