Use poison resist meads (you have to use them before you take the damage they don't help retroactively but they do run for several minutes before they need renewed). Stay rested, explore only during the day. Run around in the small strip swamps first. Find turnip seeds, take them home and plant and reseed for a few cycles to build up a supply of them so you can upgrade your cauldron and get better foods.

Use the small strip swamps to farm dragur and leeches (leeches do practically nothing to you if you are using poison resist meads). Watch out for body piles and use your bow to kill those from outside dragur perception range.

If you are being chased by multiple foes you don't have to have troll help you can retreat to an adjacent biome and get help from what ever happens to be there. The dragur will attack those creatures instead of you which can give you a chance to snipe the dragur. Boars, neck, and deer don't do any damage to the dragur but graydwarves will soften them up a bit for you. A troll will wipe them out and the good news is the troll will have very little health left which will make it easy for you to finish him off.