I miss a MM guide for 1.5

Many changes in MM in 1.5 have maden a hard class to know wich skills and wich weapons use.

rapid fire double wield with 2x GAU?
rapid fire double wield with 2x TMag ?

multishot dualwieldieng or multishot with 2 hands 600rpm?

2 hands 600 rpm rifles with ravager /concusion/ rebounder rounds

multishot

can diferent marskman post his experience and explain wich skills and set weapons are using to try to determine with ate the best builds and weapons sets for 1.5 singke target and trash clean?