Your build advantage is you have more costume than the other builds.
as other people said reroll is the best option, but if you really don’t want to reroll.
you can try
1st route >sap2>X>cannoneer----reason sap2 for broom trap and cannon can go with most class, now it come to x viable option are
- ar2 >>> swiftstep+multishot atrribute can’t change your situation, but not too bad
-rogue1 >>> capture+broom trap is strong, but you’ll useless when they’re at CD until you reach cannoneer(this choice’d be better if you have ranger1 instead of QS1)
-falconer>>> make cannon more aoe + might able to do punji+circlinge, but most of time useless until reach cannoneer(not recommend)
2nd route>sap2>scout3------I think this make another unique build lol, has strong dmg vs group from split shot and broom trap, but lack single target dmg
3rd route QS3>cannon---- have qs3 for single target dmg and cannon for aoe, but abandon sap(you might need some aoe gear too for cannon shot&shootdown to hit more enemies)
4th route abodon everthings you have so far and go fletcher3 or wugushi3, these 2 class are strong in their own, but your R1-4 won’t support much
But again reroll is still the best option IMO