The delay doesnt look that bad when you get RTB once in a while, but it gets bloody obvious when RTB activates multiple times within a few attacks.
EDIT
If we count that on average your infrequent delays result in a lost of 1 whole attack that could have happened everytime, you actually get a -25% DPS when RTB procs (0.75+ (-1)).
Adjusting the formula to DPS, in such scenario you will get
0.2*(-.25)+0.4*2+0.4 =
1.15x your DPS
Overall still a DPS boost, but way lower than the original 1.35X
Of course, the actual delay isn't always going to happen, or if it happens, resulting in only 1 lost attack, but on the whole i think the -1 average seems reasonable. We might say the real DPS gain is somewhere from 1.1-1.35X depends on how frequent the delay occurs due to RTB procing too many times in a row.
Is it worth it to you? I might get one if it's not too expensive just for the nice looks of the multiple procs, but honestly the DPS gain is dubious.
Edited by blackCROSSCY, 14 July 2018 - 02:18 AM.