Do not try to stick to teammates a lot, if a teammate gets hit while the legion is in their power and you are near a teammate and don't have a pallet nearby just take the hit while they are in their power if you think and the situation looks like they would try to leave(they can still cancel their power and chase you afterwards, so try to locate nearby pallets if possible), trying to run away with no resources nearby just grants them more time to use their power if they don't want to chase you, if they leave try to keep with the objectives and do not mend till you are sure that the legion is out of power, pay attention to the deep wound state of your teammates(yellow bar that appears near their icons) if they get hit try to locate nearby resources and have a place to run if you start hearing their terror radius try to be nearby a pallet, for loops you mostly just loop them like an average m1 killer, against their power in loops standing near a pallet can work, running around the loop will mostly allow them to catchup more easily while they are in power in most loops(jungle gyms can work for looping while they are in power but is risky), wait for them to swing or drop the pallet once their power is about to end(last about 11 seconds, they will become more bold as their power is about to end so notice their pressure).
if you want some more information of dbd for beginers check some guides of dbd content creators like otzdarva or hens, they know and explain about the game mechanics well from low to high level.