Keep in mind that a chaotic OSRS GP recharge that combines the two types of tokens will cost you around 20k tokens. I'm not aware of your rates at the moment, but bear in mind that you can achieve floors that provide 20k tokens per. As these floors typically be completed in 23-28 minutes and I doubt you'd be capable of making 2 mil when frosts are present, it is worth it to apply tokens to the repair.
In the meantime, even though you don't obtain that many tokens so fast, keep in mind that there are a limited number of uses for tokens, and there is no fluctuation with their prices (meaning that the tokens you're earning today will be worth the same theoretically as those you'll get when you have earned 120 Dung).
A great analogy is the idea of storing your effigies up until you are able build them yourself. In either way , the final reward will be identical (Dragonkin Lamp), the only difference is the things you sacrifice in the process of getting there (in this instance, xp in various abilities). In essence I would suggest that you get CCB and recharge chaotics with tokens.
If you take 100 hits, with an average of 150 damages per successful hit. We can estimate 20 of these hits will be zeros and give you an approximate rate of 80percent. If we take into account the accuracy increase of the Crossbow the accuracy grows to around 87%. And each of the additional seven hits you take will result in an average of 150 damages, of course. Therefore, the new overall average of damage done will be 130.5 as opposed to be 120 (this is because it takes into account the zeros).
Now let's see how this compares to OSRS gold the same amount of the damage. Your precision rate remains at 80 percent. Since each of these 80 hits is increased by 5percent, the total damage per successful hit increases to 157.5. In addition, we'll include your other 20 0s that you hit in 100 shots. The new total damage per shot will be 126.