Battlescript variables...

I need to verify an info... probably it's more trivial that what i might believe, anyway...

Back on the battle var which don't reset their value after battle... the range was from var 04 to var 23(in hex should be var 17)
We know that var 36 is the last battle var you can access and also that the script won't allow you to target variables above var 36(higher values will be considered var 36 too) so we have an idea of the whole var range, at least.
Well, not exatly: no one mentioned a detail... how 'bout battle vars from var 24 to var 35? their value should be resetted, i believe... but then i wonder if i can use them in the same way of battle vars from 0 to 3... surely a plenty of new slots for battles, while 4 vars should be more than enough for any battle, i might have need to have some "distant" and unused var slot for battles...
For example, about detecting escaping attempts, rather than use that slot from var 0, which would mean that i cannot use it anymore for some generic monster AI and would actually be really annoying, it would be much more better use one var like var 24(or 25 to not risk of using the last reset value var for error) to store escape check bit, and eventually some other check i might create meanwhile.
The only thing i fear is the event in which those var are used for something else and actually change value during battle...
In that case escape check would be triggered suddenly and being a problem!
Maybe i'm just paranoid? what do you think about that, should those vars(24-35) be safe for monster AI script, like var 0-3?