Thought I would try a little solo run but coming up against brick walls!

I have a fairly strong build with a decent bit of Con.

I seem to be stuck at level 3½ with no way of getting any further. Fights I have been unable to beat are Sporelings for Ranga quest, last group of shadows in Eothas Temple or Shades at Caed Nua. I got backstab for a strong opener but goes downhill pretty quick after that!

I was wondering if I need a bit of lore to use fire fan scrolls or something.

 

Any pearls of wisdom please?

Solo builds always include deep pockets and other utility talents , use of scrolls , pots , figurines and major kiting , if you thought you can go and play normal rogue with backstab build as solo you got it wrong , solo play is neither fun or interesting it is tedious hard work for internet points nothing else , this game is not made to solo meanwhile its possible you have to adjust greatly to do that , and backstab is just not gona cut it