First of all the stormcaller will kill twice as fast than what a jolders hammer will while also taking half as much damage, as for fireshield, it will give you a few seconds longer to live against most primaries or allow ypu to survive one extra melee attack, other than that it is useless, the new storm caller melee has longer range and can go for even longer range or a chained attack, which in my opinion is the much better option. Firebolt is only worth using if you have touch of flame and viking funeral which uses up two of your perks. Withought those perks it is the exact same as the arcbolt perk, and the new storm caller grenade is looking like a much better option. On top of all that sunsinger has had its super duration reduced by nearly half.