High dps weapons for low levels
Every weapon is available at every level. Greatsword and axe deal the highest direct damage while sword is more about conditions.
If you want to deal high damage I suggest buying a masterwork (green) greatsword from trading post about every 5 levels. It should cost 1-2 silvers.
Then use utilities like Signet of Might, Signet of Fury or Banner of Discipline to buff your damage.
Buying new gear with power and precision also helps but gets costly if you update them frequently.
At the low levels, Signet of Might (passive) + For Great Justice + Signet of Fury (passive) will yield you the best results for increases in damage. Ultimately, the ferocity from the banner is just not very useful at the lower levels since you won’t be stacking a lot of it (Ferocity is useless in small amounts), and needing to deal with the banner/move it is also just frustrating, and the might stacks from FGJ will yield more damage than the ferocity will. Not to mention the precision gain from banner of Discipline will be way overshadowed by long duration fury.
https://forum-en.gw2archive.eu/forum/professions/thief/ES-Suggestion-The-Deadeye-FORMAL/
If you want to experiment with condition damage then you might as well do it in the open world at low-mid levels, with swords. Power/ferocity/precision gear will be better later but mid level armor only has two stats.