33 cub and abilities

Hi guys I need your help.

I use 33cub mixing cov2,cov3 and cov 4 and im doin good honestly. The main problem is that i rush only 3 people. cause there are no good blitzes out of this formations, i think.

Wich are the best abilities to get pressure on my 3 rushers? I have Donald as DT with his 0 ap x factor (interior threat). The problems are the other 2 rushers cause i dont know wich abilities to run. Because it seems that the CPU recognizes the Left rusher as LEFT End so it seems i can run Edge Threat or ETE , while the Right rusher is recognized as my second Defensive Tackle (right?) so i cant use Edge Threat cause it wont light up. Is it right?

so wich abilities should i run?