To use a Regal Orb without destroying your gear in Path of Exile, follow these crafting tips:

1. Use only on Magic (Blue) items, never rares or uniques.
   A Regal Orb upgrades a Magic item into a Rare item by adding exactly one new random modifier while keeping the existing affixes intact. Using it on anything besides a Magic item is not possible and risks wasting the orb.

2. Choose a Magic item with desirable or useful existing mods.
   Since the Regal Orb adds a new random mod, start with a Magic item that already has good affixes or a strong base. This increases the chance that after upgrading, the Rare item will be valuable or suitable for your build.

3. Avoid using on low-quality or trash items.
   Do not waste Regal Orbs on Magic items with poor or useless modifiers because you carry over those mods plus one new random one. It’s better to start with a quality Magic base, for example, items with life, resistances, or other relevant stats — just like you’d be selective when you buy poe 2 currency to get the best value.

4. Use crafting methods before or after regaling to refine the item.
   You can combine Regal Orbs with other crafting currency like Essences, Fossils, or the crafting bench to improve the item’s stats selectively. If the added mod after using a Regal Orb is unfavorable, you can remove it with an Orb of Annulment, though it's risky.

5. Understand the gamble nature: you gain one new affix randomly added on top of existing ones.
   The process is not guaranteed to improve the item significantly, so expect some randomness and the need to try multiple times or combine with further crafting steps.

6. Plan your crafting sequence: often use Regal Orbs early to get a Rare item, then use Chaos Orbs or Exalted Orbs for rerolling and affixing higher quality mods.
   Regal Orbs are best viewed as the step that gets Magic items into the Rare tier, preparing them for more precise crafting with other currencies.

7. For maps and strongboxes, using Regal Orbs adds affixes that can improve loot quantity or quality, so use them carefully to optimize farming efficiency.

The key to using Regal Orbs safely is starting with a good Magic item and understanding that it adds a random new modifier while keeping the old ones. To avoid ruining your gear, don't waste them on poor bases, and be prepared to enhance or remove unwanted affixes afterward through further crafting. This thoughtful approach maximizes your crafting efficiency, much like strategically deciding when to acquire poe 2 currency for sale to support your in-game progression.