One Small Favour on Def/Sum Pure?

Does anyone know how I would complete One Small Favour on my Defence / Summoning Pure? It has like 70 defence and 43 summoning. I was trying to find guides on YouTube and the only things I could find was get a bunch of friends to cast vengence other on you. I don't have any friends that can help with that and also the rock monster would hit 0's on me a lot. I didn't find any info about how to defeat the dwarves. Also, I don't think I can summon in any areas where I fight the bosses because I didn't see the multicombat symbol on any of the videos. Thanks for any help .

 

hey, i have a summon pure its not very difficult bring rock lobs super attack and super strength potions and poison it you have to move around with it though or it will disapear lol gl

 

i had a summoning tank , 75def + 59 summoing.

 

Choma stop gravedigging and spamming every single thread?

Someone ban this guy please lmao.