1) What are the best tech builds to aim for?
2) While at it, should I aim for every single achievement or just try and beat the mission?
3) What units/buildings should I upgrade to help me overall? (Used medics/marauders/marines/banshees/vikings/battle cruisers/siege tanks the most.)
4) Any good tips or websites I should know about for helpful mission walkthroughs/tech builds/achievements walkthroughs if I'm stuck?
Thanks for all posts and advice!