yes, an iron knuckle riding a mechanical horse
If it ends up you need more money to finish the run than you have, maybe you need to change your strategies. Are you selling Hi-Potions or holding onto them? I'm not sure how much HP you'd have at Level 34, but it's probably a better idea to hold onto your Hi-Potions and only use your magic for healing when absolutely necessary. (This is if you're even getting a supply of Hi-Potions to begin with.)
What strategy are you using against The Destroyer? It's been a while since I've fought him so I forget his tendencies. I remember he has the Dark Cloud attack, which works mostly like a single tile Ice Wall (except you can't break through the barriers). I also remember his final form being very devastating with physical attacks.
You may want to just start using the Charge ability, long since left for dead. Sometimes it gives you "Missed!" but often you'll be able to restore more than you put into it. You may want to leave 1 SP laying around after any attack (so try to have 4 SP on hand before you throw down a Holy). This may help you, but it may require a varying amount of luck based on how many castings of Holy you need. If you do this, you should only use Hi-Ethers when you run out of SP or are coming very close to finishing off his final form.