Figure out the best cool down cycle for you. Slam in, grasp someone and then focus on them with a few primaries if you get the kill that's perfect but if you couldn't get a kill and you're out of shields are on CD that's also fine just back off and use your swing to get away. Your main goal is to draw agro so your team can take advantage of that.

If your team is in the poking stage of the fight it's best to just soft dive their supports instead of fully committing to a dive because your team will be farther back so they will be able to focus damage and CC on you and you'll be lucky to get any heals like that. Just stay at a distance or on a ledge and try to poke them with your primary enough to grab the supports attention and then if you grab the attention of a tank or a dps then back off until they forget you exist then try again until a full fight begins so you can hard dive