What type of skillsets/roles are required?

Working groups should always have a founding charter that the community can refer back to.

Budget funds should be held in a multisigAt least 4/7 signers to avoid any central point of failure

Skin in the game is necessary to align interestsPerformance bonuses should be in additional governance token compensation 

Regular budget analysis should be a requirementExpenses should be tracked and justifiedGives token holders one way to evaluate performance

There should be formal and informal reporting requirements in place when working groups are established. After all, working groups should provide proof of work if they are receiving compensation from the treasury.

Community-driven working groups are the most effective way for DAOs to engage their communities, tap into the talent lurking in their social channels, and give community members skin in the game and the resources needed for success. 

Stablecoin payments are necessary for cost of living, taxes

Constraining funding too much will likely constrain the ability to attract quality contributors. A DAO should strive to create a culture where talent and performance is rewarded.