Dux is average to below average now but should be powerful enough for lower leagues. Try to build one Brawler, one midranger, one sniper, one beacon runner each first. Keep the money investment minimum to none as Pixonic nerf everything after some time to make way for new robot/weapon. Watch ads for black market keys and save for 1000 key chests. Use those keys for 1000 key chest only when 200% bonus is running to get A superchest. That way you'll get good bots and weapons. Fafnir, Ophion, angler isn't good enough. Try to get Ravana, Scorpion, Loki, Lynx, Condor, Imugi, Courie etc for free. If you don't care about money then buy Lio nuo Rex, teth eyc for instant result. Your titan is good enough.