This is the way i dolo (duo but solo, two accounts youre running) K'ril, arguably the hardest boss for ironmen too solo. You can also do this with a friend instead of doloing. This way grants 15+ kill a trip.
The Tank goes in the room first with full tank + Protect from Mage, he/she runs around the room until K'ril focusses the Ironman.
The Ironman then follows with Protect from Melee and tags the Melee minion off of the Tank.
The Ironman then kills K'ril, then blood barages the Melee minion + Range minion.
If at this point the Ironman still does not have 99 hp he/she kills the Mage minion also with blood barage, if he/she does they can use arclight.
Now the Ironman positions himself in the middle of the room near where K'ril spawns and puts up Protect from Melee and Piety.
The Tank positions himself near a corner with a whip (or dscim/tent) and Shield + Protect from Magic.
When K'ril spawns the ironman uses his arclight special attack on K'ril and then tags the Melee minion.
The Tank goes in and tags the Magic and Range minion, then it puts on full tank and sits in a corner. (This way all the minion drops are usually for the ironman, unless the Tank hit to much on the tags)
Do not use Guthan's on the Tank unless the Ironman is good on supplies and does not need minion food drops.
The Gear Set-Ups:
Feel free to comment any suggestions or questions you might have.