About your question as stated in gogo's linked about shard mods actually gogo's right about this I tried some number crunching and it seems getting the frost mod rather than fussilade is better why? cause the damage you can achieve with 55 thorns at any current level is less than you can achieve with frost mod, cause if you'll try some experimenting if you chose fussilade the base damage of each thorn is lowered by the game.
If you take frost mod:
50 thorns with lets say base damage of 60 dmg/thorn = 3000 dmg pts. if you add the frost mod it can become: 50 thorns x 65 dmg/thorn =3200 dmg. pts.
whereas if you take fussilade:
50 + 5= 55 thorns x 55 = 3025 dmg. pts.
as you can see its better to have higher base damage early in the game its not a big increase in damage but it can help flatten some unsuspecting kobolds.
Any way this calculation is based on experimenting on seven different Ice Elf builds I made corresponding to different theoretical builds by other players but I think gogo's and schot's the best and safest builds anyways its my opinion cheerio!
Hey there dark! Yup, as soon as I posted that question I did some number crunching my self with some theoretical scenarios involving number of shards hitting monsters vs. all of them hitting but still same results. The Frost mod is still mathematically the better choice. Based on numbers, I don't see why anyone would choose the other options when one appears to be plain BETTER than the other. Just an opinion though