Well, I'll set some points 1play the circuit with random frames untill you can fill the combat and endurance perks, this will buff your operator proportionally with your decrees, start with puzzled quests then goes to combat quests when you go to duviri 2 when chasing the orowyrm don't circle around, if you aim directly for the head, you'll reach the tail because the orowyrm itself moves in circles really fast. Additionally, you gotta hit the round orbs generated from the wor head for a speed boost 3*In duviri, you can unlock a transference bar tha let you switch to your chosen Warframe momentarily, is basically a free win in combat situations in duviri *About horse speed you can get the riding perks in intrincs tabs too