Assasination Rogue Weird BiB

Hey Guys here is my import string:
$57;US;Sargeras;Àcc;Savants;5;1;110;13:1,15:19,11:800,3:800,14:700,12:512;1;.s1;25;1133111;323,1,1,1,1,1,1,1,1,1,1,1,1,2,9,1,929,108,193,1,1,1,71;4,4,4,4,4,4,4,4,4,1,1,1,1,1,1,1,1,1,4,1,1,24,1;152056b1502b3337b3611,152049b1507b3337b3611,152028b1502b3528b3612;1,1739,41,3,-1455,-3,6,1,1,0,0,1,0/2,1408,35,-4,-193,-1248,2,1,1,0,1,0,0/3,1408,42,-11,-193,-1254,5,1,1,0,0,1,0;.s2;26;;;;;;.s3;27;;;;;;.q1;128869s17;1s16b741x152056y-7z-21;4768s11b856b1739b200e5429;731s8b-1904b1705b199;2729s9b-77b171;435s12b-2018b1725b199e0;6703s3b-1725b1819e11;7701s15b-3590b1452b1844b275e-8;31s13b-2109b1835b274;5s2b-2109b2026b84e458;17s6b-2105b1829b276;170s5b-2110b2026b84;2s10b-2110b1835b274e-446;1s1b-2119b1844b275;1s7b-2124b2041b83;2010s14b374b12;.r;_;.inv;2459;3053;744;692;728;0;0;0;707;11588;14527;5697;31439;38926;7446;1;6664;0;3163;1;7b600b69b20;5;1;1;9;618b54x137351y18501z-13670;67;6;130;193b-1x11904y-2038z-8344;3327;5;240b1069b1819x7880;1128;0;0;48b-2018b196b1529b198x0;14b-1903b1705b199;86;256b-77b171;304b-3589b1561b1926b8;158b-1944b1936b8;17b-1924b196b1529b199x0;35b-1939b211b1528b200;1b-1919b1720b199;2078;217;235b-77b171;9b-171b171;19b-171b171;20b-1819b1819;30b-171b171;384b-2038b1936b8;159;469;367;627b-1914b1715b199;197;126;158;0;606;395;1018;512;28b-1969b1770b198;256;1384;672;1951;505;668;0;0;255;1226b-1978b124b1847b55;2081;413;0;0;0;259b-1772b1819;149b-2143b321b1720b83;2b-2119b1844b275;6b-2124b2041b83;10b-2124b2041b83;1b-2109b2026b84;7b-2120b1844b275;74b-3569b1445b2041b83e5429;28b-2139b2056b82;1b-2103b1830b274;67b-2119b1844b275;1b-2124b1850b273e6;3b-2123b2041b83;1b-2139b336b1720b82;461b-151b171;929;2276$

The best in bag for this setup is actually weaker in dps then my original setup. It looked weird for me too as I saw a 29% mastery decrease. I simmed both setups and I got about a 3k decrease with the new setup then the old one. Any reasons why Mr Robot would suggest this?

I tried out your current gear in that string, and the recommended gear, and saw a similar result – they were within about 4000 DPS of each other. That is smaller than the margin of error that I was using (0.25%, which was about 4500 DPS).

There is always going to be a margin of error, particularly with an optimizer that is sorting through billions of gear combinations in your bags in just a couple of seconds. The trade-off is speed for a little accuracy. We find Best in Bags to be an excellent trade-off, in that you get very little gain in accuracy for a massive reduction in speed. To reduce the error significantly, it would take several minutes or hours of simulation every time you pressed “Best in Bags”. We don’t think that’s worth the wait, given that when the optimizer doesn’t find the best possible answer, it is almost always within 1-2%.

In your case, 0.25% is well within that margin of error – you would be hard-pressed to tell the difference in-game, so go with whichever setup you prefer.