How to build a (speedy) Lachesis?

Even with +spd and 5*+10 she'll only reach 32 speed so it's difficult to make her speedy in general. My Lachesis is +10 and I have different builds for her, my favorite though is absorb with wrathful staff refine, close counter and quick riposte 3. She can tank mages etc pretty good and heal herself and allies close by just by fighting and thus most of the time keeps in quick riposte range. 26 defense with neutral points isn't that high but if you give close defense as a seal absorb will really take it's effect for good. Otherwise you could use a pain/vantage build with Savage blow and miracle. Attack someone who can counter, bring Lachesis in Vantage range and watch how she lowers everyone's HP and kills most of the enemies without every actually getting hit on enemy phase. Both are really fun builds. If you actually want to make her really speedy, you could make a +spd +10 Lachesis with sth like Atk/spd bond or Atk spd push, speed +3 seal and slow staff, she will have 40 speed as long as her A skill is active and when slow staff effect is active on the enemy she has an effective value of 47 speed. If you still use quick riposte as B-skill, Lachesis generally should not get doubled but always double herself on enemy phase as long as in HP range for QR.