These are the times that it takes for a person to climb the magic tiers, up to tier seven as that is how far we have reached in the story in terms of strength.
[Tier 0 - Tier 1] > 5 Years
[Tier 1 - Tier 2] > 10 years
[Tier 2 - Tier 3] > 20 years
[Tier 3 - Tier 4] > 40 years
[Tier 4 - Tier 5] > 80 years
[Tier 5 - Tier 6] > 160 years
[Tier 6 - Tier 7] > 320 years
This is how old a person would be if they cultivated continuously without using magic crystals.
[Tier 0] : 10 Years old
[Tier 1] : 15 Years old
[Tier 2] : 25 Years old
[Tier 3] : 45 Years old
[Tier 4] : 85 Years old
[Tier 5] : 165 Years old
[Tier 6] : 325 Years old
[Tier 7] : 645 Years old
This is the percentage reduction on the time of cultivation when using magic crystals.
[Tier 0 - Tier 1] > 70% Reduction
[Tier 1 - Tier 2] > 60% Reduction
[Tier 2 - Tier 3] > 50% Reduction
[Tier 3 - Tier 4] > 40% Reduction
[Tier 4 Tier 5] > 30% Reduction
Magic crystals are not useful on Arc Mages for reasons that will not be stated to prevent spoilers.