No, I dindn't missed the part about your run with +25% movement speed and I agree that 25% alone isn't enough (about 3sec too slow in my test on a core account) but that's why I also mentioned swiftness and movement skills. As movmenet speed boosts don't stack, it doesn't matter if you have swiftness or the 33% boost from the mastery. So, lets look at your classes (i only consider the core skills, so they can be used by every account):Engineer: permanent swiftness through Trait "Streamlined Kits" (Tools X 1 X) - just swap to a kit every 20smovement skills: e.g. "Rocke Boots"superspeed: Tool Kit together with "Streamlined Kits" , Toolbelt skill of Slick ShoesNecro:permanent 25% - Skill: Signet of the Locust permanent swiftness should be possible too - Warhorn 5 + Spectral Walkmovement skills: not much on core nec, maybe Flesh WurmGuard:nearly permanent swiftness (or permanent with higher boon-duration) - Staff 3, "Save Yourselves!" , "Retreat!" (use this Trait for the shouts: Pure of Voice - Honor X X 1)movement skills: not much on core guard (without targets), maybe GS 2So all 3 classes can get perma swiftness and so they are as fast as someone with the 33% buff. From your 3 classes, engineer should be the easiest one, as it has better movement-skills and access to superspeed, if you have unlocked the elite-specs, you would have even more access to superspeed and leaps. If you want to be even faster with swiftness, there is also the Superior Rune of Speed which increases the movement speed by 66% when under the effect of swiftness. At last there are also other ways to do the achievment, you can use one of the novelities with movement skills like the Choya Pinata Tonic (endless one from the amnoon casino, or one-time use from the tp for about 1g), or the Executioner Axe Toy. I tired it with the choya tonic today and had 1:20min left. If you need further help with the achievment, just ask, maybe I can help.