In the short term, scrolling your zhelm for dex and getting an egged htp from a vip ht run will give you ~35 or so extra dex immediately. You can also just add some base dex to be able to wear an rc. Over a longer term, you'll want to change your cape and shoes out for pgc/bfc and fs respectively, and change to thief top / bottom which should give you more stats than the bathrobe. Adding base dex to hit the dex requirement for an rc will also probably still result in you doing more damage than with the skanda, so you may want to consider that soon and just wash out dex slowly as you upgrade your gear.
Hello, I was just recently in your position. You can definitely achieve your rc as a dexless. Upgrade your cape, because its is difficult to find, I took the liberty to scroll myself. My 12 dex cape and 11 dex went for 60m and 35m recently just to give you an indication since you posted in p/c. I'm selling a 15 dex one (level 90) for 90m if you're interested, which I was using before htp. Getting htp is a nice suggestion but you'll have to wait till 120 which is 20 levels above rc. Next you could work on your shoes. I bought mine 13 dex @ 50m, accidentally sold off at 4m. I would recommend you getting a high dex zak or scar helm, and scroll with 60% dex, if you get zak, you could try scrolling in zak's lair some 30%s as well. Fail , then pick a new one. Minimally should be 34 dex. (For your dexless goal) Get 12 dex earring for around 500m-550m. Krex ring 3 dex Mulang belt free. Red belt +3 100% dex should sufffice. You can invest in a top + bottom but I dont think its worth? I am having 25 dex and 26 luk for about 500m and doesnt really increase your main goal (to be dexless) With htp i ditched my cape for a bfc. My idea is that for every ap you wna add into base dex, you can spend that amount minimum to buy items to increase your dex temporarily. Because items can be sold for a (lower) value, but apr is gone. Ur glove and claw now is really good. You might want to remain pureluk until 120.