I don't know if djm34 is already working on lyra2re2 for ccminer, but if he isn't, that might be an interesting algo to add, instead of axiom.
About neoscrypt, I could get another couple percent of hashrate and I'd like to push it when done.
There was a good amount of code to enhance, remove and cleanup.
But I don't have other cards than 970 so it might be slower or not work at all on them.
I can help you tune your changes on the 750ti. If it's slow we can split it like in djm34's lyra2re code. A seperate kernal for the compute 5.0. Just use github and add a pullrequest.