What are the most effective ways to build a strong army in Halo Wars within the

[Doug]

first 5-15 minutes? Please give suggestions for both the Covenant and Unsc, and avoid mentioning rush tactics. I just want a strong, multi-use army that can take out infantry, vehicles, air, etc.... as fast as possible

Things to mention:
What leader should I use?
What buildings would I build first?
Which units should I train early?
When do I upgrade them?

I'll test these and give best answer to the best tactic

thanks =)