Need to find a new backhand for violin

I've been playing with a nittaku violin, a fastarc-G1 on FH and rakza 7 on BH. I mostly loop with FH and I flick, push and drive with BH

During yesterday session my coach tried my bat and I used his, he uses an off+ blade and softer rubbers ( an acuda S2 on BH) while my blade is more flexible with hard rubbers. 

So I noticed that I had a way easier time playing my backhand( flicks on serve,loops,and drives) and throughout the season I saw myself missing a lot of backhands shots with my own bat ( I still gained 3 rankings nonetheless). 

On the other hand I hated his forehand because I didn't feel the ball as much as I did with my fastarc-G1 and I use a big swing for forehand.

Unfortunately I cant do the same with the rakza on my backhand I often go off the table and I don't dare using bigger swings because my technique is not there yet. I also tried using the G-1 on BH but it's about the same.

Coming back on the main topic I'm looking for a BH rubber that would be softer (but still go well with violin) and have a lower throw angle with a little more dwell and less speed

I've already search a little and here are some rubbers that I think could do it: 

-Donic acuda S2

- yasaka rakza 7 soft ( not sure of that one since it seems to have about the same throw angle and speed as R7)

-xiom vega europe

- yasaka mark V

-friendship focus 3 snipe ( need feedback on durability as I use rubbers for 1 year)

-Nittaku hammond pro beta 

Tell me what you think of it pls and if you have other rubbers do not hesitate to recommand them to me

As for the gewo nexus I think it might be a good fit. However there doesn't seem to be a lot of informations on it. Do you know how it compares to rakza 7 in terms of throw angle, speed and control ? 

Both of these rubbers have a sponge hardness between 40° and 43 ° which matches with what I'm looking for.

Thank you for your input.

I suggest you nittaku fastarc s1 it is like a tamed t64, low throw insensitive to spin very very durable, but only black rubber. 

I should precise that I use my backhand mostly for flicking, pushing and I loop/drive mostly close to the table or mid distance at most so I don't need a high arc (which the violin should provide on its own) nor speed. I also serve about 70% of the time with my backhand. Other than that I am still a FH dominant player I have a rating of 1200 and aim to go to 1400-1500 by the end of next season ( I was at 850 at the beginning of this season).

With everyone's input I was able to narrow my choice to 4 rubbers : 

-Xiom Vega europe: from what I've seen people are saying this is a really soft rubber however Xiom indicates it has a 42,5° sponge hardness so it should work in theory but it still riddles me.

Other than that it seems rather consistent and leaning towards what I'm looking for.

-Nittaku hammond pro beta: it does seem to have a really low throw angle ( even lower than others) so if anyone has played it do you know if I could still loop heavy backspin ( knowing I loop mostly close to the table and mid distance) ? 

-Donic acuda S2 : seemed reliable enough but I'm still weighting other options. 

Fastarc S-1 : looks like it would suit my game but there seems to be some quality control issues from what I've seen on this site

Thank you in advance for your prolonged help ! 

I'm a bit reluctant in giving advice in these kind of threads but here goes my 2 cents.

Just switched after a season with an off- blade (so similarish to violin) to a TBS (which I had used before). Backhand rubber was FXS on the off -, now I've switched back to Acuda S2 on the TBS and my backhand has improved tremendously. (However, lots of coaching has been going into it continuously as well.) 

Try Acuda S2 is what I would say, can't go wrong with it really but in the long run a slightly faster blade is probably what will make your backhand feel a bit better.

The Victas V 01 > Limber seems to be an interesting choice.

Is anyone familiar with this rubber ?