I don't care about Thanos, nor the MCU only. I don't know if Strange can open and close portals in the comics, but I only want to know why he as a character doesn't use them to fight.
Why doesn't Dr. Strange fight people by opening portals in front of moving body parts (punched fists, running legs, jumping heads) and then closing the portals?
It seems to me this would be so efficient, what can the bad guys do?
When someone is distracted, quick, open portal below him, he falls halfway through, close portal. Why doesn't Strange do this more often?
Why is this not something he practises?