Can you please add options in the configs to disable flying or change the mana drain on the tiaras? There's so many mods out there that adds flying and even more mods that get too easy when you can fly. I've already disabled/tweaked other items from mods to make flying more risky or expensive but there's no options for the tiaras in botania, but something like a mana usage multiplier or just an option to disable the flying on the tiaras would be nice.

Come to think of it, a mana usage multiplier for the mod as a whole would be nice, like x2 mana required to perform mana usage tasks, such as making terrasteel would require a whole mana pool rather than half, due to mod packs already being very easy for getting resources.

The next version will already have configurable mana cost for the Flügel Tiara, but may be released only next month.
Now about a mana multiplier for the whole mod, I feel that Vazkii isn't going to implement it.

I feel like the only way a mod-wide mana multiplier would work, is if it had a minimum of 1x. So you can make it more expensive, but not less.

I think you can use Modtweaker to adjust the mana cost of some operations (like Mana Pool or the Runic Altar), just remove the original and add a new cost in the script.