Really great work. I've never met somebody who was a dex whore with low def who was unhappy, much to my surprise. I always advocate for people to get at least 1B in every stat since 64x is a huge mitigation ratio to achieve, and even that gets thrown out the window when a Sure Shot is involved. I had switched from Baldr's def to Baldr's dex around 700M high stat, though, and then only abandoned my def once it was at 1.3B (as my second high stat at the time). My only good remaining training book is the 30% def gain one, though, so I may revisit it sometime soon when finances allow, to pump it up just a little bit higher (especially since I ruined the nice exact 1.3B I had with the 5% def gain up to 10M book, and then a golden egg, leaving it on an ugly 1.323B). Would like to redeposit it on a multiple of 100M for the foreseeable future and go back to leaning into my dex (which is currently about 9.4B; I'm a one trick pony).
No regrets choosing dex as my whore stat way before it was half as popular as it is today. I love that I can stealth just about anybody even in a 25 turn fight, as long as I win, so long as I have large suppressor equipped (I'm naturally masked and have 10/10 stealth merits, too). It's also nice not to be stealthed, and to have such a short list of people who do stealth me that I can typically tell who it is when it happens. It's also great to dodge debuffs and stuff like cattle prod.
Onwards to many more bill of dex. Will be curious if you ever decide to go back for your defense.