Act 6.3 one of the hardest story quests that require lots of strategy and a variety of champions to explore 100%. However, Kabam has made boosts available on paths and also in the store that costs 50 Units each boost if you need some additional boosts.
Boosts are class restricted and made to use on specific paths. So it’s not like you can use the boost and go-ahead to explore any paths. It is also made exclusively to be most effective in Act 6.3, so outside this content, it might work but not very effective to use.