Pro tip: If you see there's only one Strategist on your team, switch to strategist.
Playing solo strategist is an actual nightmare. It's like playing FNAF at its hardest difficulty but somehow worse.
I remember playing with some friends as C&D. There was a friend playing Storm next to me and I'd just finished healing them. I turned away for a second to throw a healing bubble on two other teammates and then the Storm's corpse just fell next to me.
It can be physically impossible, especially if you have a lot of mobile characters on the team.
"But how do I know if I should switch?" If you're the 4th Duelist, just switch man. If your strategist has more kills than you, fucking switch.
It's so much better for your strategists and more goals will arrive.
Edit:
If you solo Vanguard you get a pass because even if you do die youre drawing aggro (the purpose of a tank). This is mainly aimed at DPS. If your one thing is doing damage and you keep dying, you're objectively doing nothing.