My phone scores 1800 in Benchmark on stock rom. I enabled expert settings and used settings :
cycles=max 120%
memory=32
core=dynamic
[sblaster]
sbtype=sb2
or
disable sound completely. “rate” for music and mixer set to 16000.
Now it is on my phone playable, even still not at full speed. But my phone is not rooted, maybe you can get good performance, because your is.
I noticed that game runs worse if I set cycles manually. Best it was with cycles 120%