first of all, i'd recommend you drop triangle shot and the bow line of skills completely. a 'bow' chaser is pretty much only a leveling build with arrow storm. unless you're experienced and well funded and are playing around with a niche build, triangle shot will do virtually nothing for you. it's sad, but true.
that said, if you still intend to pursue the build you'll need a high refine catapult and 120 agi for half decent damage. you'll want to stack as many ranged modifiers as possible since triangle shot has a terrible base level atk modifier, and bear in mind it's a single target skill so you won't be able to level with it. also note that it has a half second delay so you'll need to be in strings for good dps, or own kiel cards. another thing - don't ever bother ctrl clicking stuff since your auto attack damage will be garbage, even at 193 aspd. the agi is purely for triangle shot damage and it helps with animation delay in strings.
regardless of whether you decide to keep triangle shot or not, if you intend to level with arrow storm (as you should) i would recommend you invest in leveling gears instead. get a +9 rwh and incubus pet to help combat the high sp cost; if you have the money a +9 vanargand would be even better. for weapon you should aim for a high refine orc archer bow with steel arrows for the +50% ranged damage bonus. a porcellio carded armour, the bsb combo and fs rwc rings are other good options to stack flat atk. an ea10 menblatt faw would be the best garment. you could also try temporal boots, although i can't really comment on them since i don't have experience using them on an arrow storm chaser. you might also want spell rwc pendants to reduce cast time, especially for soloing.
there are really only two good places for you to solo at, either nogg road 2 or niflheim. intimidating aspersio from a priest will help you one shot at both places. once you get past around level 120 soloing becomes incredibly inefficient since you won't be able to one shot much at all, and tanking the mob for the 3 seconds it takes to AS again is not practical.
if you want to continue soloing at this stage the easiest build to reset to is an ignition break build. you don't need as specialised gear for this and you can stay in scaraba hall 2 until you hit 150~160 quite easily. other popular options include an auto shadow spell build, which is expensive and more for fun than anything else, a severe rainstorm build, better damage than arrow storm but an extremely unforgiving sp cost, and a blaze shield/psychic wave build, effective but also supply intensive and requiring constant gear switching.
if your end game purpose for this character is woe/pvp, you can reset to a dex/int/vit build with jack frost/storm gust/frost nova and pull/tank in TI/bio4 parties until 175. this is probably the fastest way to 175 but it's also the least fun and it'll make you want to delete your chaser so don't do it unless you really have to.