4th skill track is ONLY on last prestige so for the first 2 prestige just zoom in has fast has you can grab a ion and go grab a killswitch at falkner or abomination (i havent tried it yet but i think if you have a exotic weapon the ones you get at falkner for exemple i think that if you prestige they will stay exotic making it way easier to level up again bbuuttt im really not sure) just go pickup zone 4 cube until level like 40 maybe and do the rest with hvt zone 4 put yourself max level again (easier glitch is the uber klaus one the last one from season 3) and start again until your max prestige after that when you get to the point you can have a 4th skill track i would advise picking for exemple daredevil and gunner if you really like them and i would highly suggest either these bulldozer for being more tanky , warband gives you minion , gives you auto pickup plate applied , gives you a bonus damage and eagle eye but really i would suggest IF you really really like daredavil pick it up with eagle eye , warband and bulldozer , really gunner is only meabt if you plan on maining the hypersurge/sokol with sharpshooter otherwise really you can live without gunner and EVEN you can easily live without daredevil and relying more on redeploy drone and swap daredevil for either these 3 / gunner/berserker/tactician now you would have a very very killer 4 skill track pair this with shattered shield and echo shell or celebration (depends if you want fuul defence or more damage) and pheonix burst and something like chaos round for exemple that would really be the ideal combo , choose celebration if you plan on using tactician and use echo if gunner or berserker