Hi Magnus - Welcome to Pherotalk. 
OK - You are going to need to have a good read of this thread and follow the links that deal with finding your Sweet Spot anf the basics on phero choice:
Now, to your choices - TUTH is a product designed for enhancing sex in an existing relationship - So fine with your wife. However, there are a whole lot of reasons why a relationship goes cold and it may be that some of the social mones might be more useful instead. Read-up on Instant Shine, IO, IH and IG.
Is your wife also Asian, you don’t say? If she is, you should be aware there is a known issue with Asian women and androstenone - They (generally) seem to prefer/respond to a lower level than other races. There is some debate on why and yes, you do get exceptions - you will find a fair bit of discussion in Men’s if you search.
Lastly, if you are looking to use TUTH for pickup, think again - It can work, esp in someone mid-30s and above in hi-status mixes with A314 in a clubbing/ONS scenario, or when heavily moderated by socials but on the whole, it can come off as waaay too horny/aggressive/creepy if overused. Also remember that a younger woman is less likely to respond well to lots of none as their tolerance is liable to be far lower - by the time they are into their 30s tho, it does tend to get much higher.
Ammo however is a much better choice as it is balanced by similar proportions of the two other main pheros and yes, by your mid 30s you may benefit from the double strength version. You will also find you can steer its effects by judicuous use of the socials alongside it.
Lastly, testing - This is nowhere near as simple as banging-on stronger pheros. You need to find the doses that work best with your own body chemistry, personality and social situation - for each one, individually! Although you can be a little more free with socials as they don’t contain none. Pretty much, you are going to have to start with one spray and work-up till you see the hits rise and fall, then back down to where they worked best.
Only then, if the doses work out ok will you really be able to decide if the double strength is a suitable and cost effective purchase.