I went and customized all mine so have no idea what the defaults are any more.
Give the game some time. When I first started my Titans were getting killed quickly. A good Ronin (the fast one) can still take me down quickly. I use Tone now. Make sure you use the dash to get out of damage and also you have to use your defense. Takes awhile to get the hang of it.
My favorite weapon is the Flatline. More damage than the default gun (R-201) and still very accurate. It's sideways kick is not too bad.
My favorite anti-titan is the Archer. Lock on is a nice feature. However, I am going to experiment with other anti-Titans today. When I am Titan I seem to get attacked by Thermite more frequently now.
My favorite ability is cloak. Cloak is key for attacking Titans as a pilot.
My favorite ordinance is the electric smoke. Covers a good field, prohibits visibility, and kills pretty quickly. I'm surprised more people don't use it.
My favorite Titan is Tone. My perk is starting with 30% core because the core ability is very deadly.