No need to be that ambitious ^^;;

I think they probably need to give Bard maybe 4-5%, and give the other two ranged 1-2%, ideally aiming the Bard changes in a way that helps them deal with downtime better. Simple potency tweaks would do fine for DNC/MCH; not that they don't have room for design improvement, but it's not causing balance issues the way that Bard's downtime problem is.

For Bard, a second charge on EA would be a start, not a large buff (maybe a percent at best) but it does a lot of desirable things (makes job less punishing / stressful for newbies, creates some decision space, adds compensation for downtime).

After that, I feel like buffing Raging Strikes to 20% (worth probably 3-3.5% overall) would be a quality change. It wouldn't assist with every downtime (the worst cases are already ones where a phase is 2:50 long or something) but it'd help with some, while increasing the payoff for better gameplay in a positive/rewarding (rather than a punishing) manner.