Originally posted by Veseljko:

It can be pretty fast even in bronze gear. You should be able to parry with upgraded bronze buckler and 3-combo attack with bronze axe. Repeat 5-6 times and it is done. However it depends on your skill. Lower skill levels will drain your stamina faster so it will take longer to kill it.
If you bring it over surtling spawner you can do it even faster. While staggered over surtling spawner, abomination will take more fire dmg.
Also i have read that elder power helps a lot.

That a decent combo. You definitely want to use a sword or axe and if you can mix in fire that's good. I don't think I'd bother with fire arrows. Definitely don't bother with spears, atgiers or any type of club if you have the choice. The attacks are pretty easy to time. If you can't block, then dodge. If your skills are on the low end it might be useful to bring along the mats for a Bonfire if there are no Fire Geysers. That means carrying an extra 55 weight (bonfire + workbench) tho. Hopefully you've found Haldor by then and bought yourself a Meginjord.