Runescape: fighting Jad for fire cape?

I've never attempt to get fire cape( only when I was a noob and failed). But now I'm 99 defence and 85 range, 94 hp and 112 cb. First time doing it, but don't worry about da right gear and stuff I'll just YouTube it and buy the best gear. All I'm asking is (1)how long do you think I'll take? (2) between , easy , medium , hard , what do you think it will be for me.(3) from a scale from 1-10 how hard do you think it will be for me?(4) at what try ( attempt of getting the cape ) will I get it? Please all I'm asking is 4 questions above , please answer them below