With all due respect, you need every bit of rcr and cdr without compromising direct damage stats.
All slots are reserved for smt more useful.
If you are bargaining for AD, sorry to say but you are doing it wrong.
Since sentries stopped having their own rotations/as breakpoints, they now mirror the spender you cast. So +sentry damage will effect only those mirrored shots (and sentry's standard bolts), while +spender damage will effect that spender+mirrors (but not the standard sentry bolts which is neglectable).
All slots are reserved for smt more useful.
If you are bargaining for AD, sorry to say but you are doing it wrong.