Does Trinity and Skyfall work the same as Draven Audacious in terms of getting 8 points?

Yes, they work the same way as Draven, Audacious in that they can be used to reach your 8th point to win the game, bypassing the standard "must score both battlefields" restriction.

According to Rule 448.1.a.1, points earned from sources that are not "Conquer" or "Hold" actions (such as triggered abilities) are not subject to the final point restrictions that require you to have scored on all battlefields that turn.

Here is how the interaction works:

• Draven, Audacious: His ability is a triggered ability that grants a point upon winning a combat. Because it is not a "Conquer" or "Hold" action, it is not beholden to the final point restrictions and can be used to reach your 8th point (RiftJudge FAQ #8530).
• Trinity Force + Skyfall of Areion: When a unit is equipped with both, the "When I hold" ability of Trinity Force becomes a "When I conquer" ability due to Skyfall of Areion. While the point gained from the conquer action itself is subject to the final point restrictions, the point gained from the Trinity Force triggered ability is not. Therefore, the trigger can be used to reach your 8th point even if you have not scored on all battlefields that turn (RiftJudge FAQ #7390, #8622).

In both cases, you are using a triggered ability to gain the final point, which bypasses the requirement to have scored on all battlefields.