The World Box pets got me set for that slot for the near future... got really good luck with them, and those pets are almost *too* good... it makes me sad that Bruce Lie SE rendered my Kooh completely obsolete before I even used her
However I'll buy the Mercury Special Set for my fox (leaving my Arin stuff for my 2 sheep) and the Venus Special Set for my DP cat (yay HP-compable sword, unlike Mary's), which uses up about half my points on each account. I have no idea what to buy after that, might get one of the 90/110/130 guns by itself for my lion, and need to check if the boxes would be worth getting. I'm tempted to buy a sprint, but I really don't want to use timed items when I play on multiple accounts/servers.
One thing I'm definitely not buying is gacha coins... except maybe if I spend my free coins on the special town and get 5 different rares, I might consider trying to finish it off then.