So you don't want to change sessions when you are doing CEO work or biker resupply well you can but what about the hydra scum well method 1 is a really simple one so if the hydra scum arrives take out your homing launcher shoot at him then if he is not brain dead he will dodge the rocket and when this happens while he is dodging the rocket shoot him with a sniper like the heavy sniper this is taking some time but it is a safe way of killing the hydra scum.

Shoot him with a sniper that has explosive rounds shoot him 1 time hydra disabled shoot him 2 times hydra destroyed this is actually the best way of destroying the hydra scum but only a small percentage of the gta online players have this sniper riffle.

So you also have lester ofcourse you could just go offradar for a minute for almost no money the is also ghost organization which lasts more time with costs a lot of money and still if you are on a high way in a car driving like crazy and out of line or simply in a car that doesnt spawn normally in that place like an armored kuruma the hydra scum will still spot you but he must be smart.

Well they can dodge the homing launcher rocket but they can't dodge the rockets of an chernobog thats death for any plane or helicopter the chernobog has the longest lock on range and best rockets in the game and this can destroy every flying vehicle even the oppressor.

Hide in downtown los santos or garages until the hydra scum gets bored and goes away from you and if it is a leveled garage like the one at los santos airport he can activate vtol mode and shoot inside well then shoot back because then you can instantly take him out but like 80% off all hydra scums won't even try to do this because they know the risk of getting head shooted with a heavy sniper rifle in the face while sitting in the cockpit.