[3.3] CI Wandcultist - League starter - Fast mapper - Guardians on a 5L - Shaper down

First of all, I don't think your wand is very good, as just throwing in a min-rolled Piscator's is a pretty substantial upgrade in POB. At the time of this post, there is a near perfect Pisctator's for sale for like 60c, but the rest start around like 1ex. When searching for a Piscator's, you want one with preferably 16%+ Attack Speed, 370+ Accuracy, 27%+ Crit Chance, and like 110%+ Ele Damage, though if you do searches without the Ele Damage restriction they become cheaper. If you really want a rare wand, aim for one more like Bristoling has on the first page, with a good rolls on Attack Speed, Crit Chance, Crit Multi, and flat Lightning. Though I do see that your wand has mana leech on it, so doing this you will have to move a point to that node in your tree, I'd recommend one from the energy shield wheel above the Scion start.

Another thing is your gems, getting quality on them will always help your dps, along with getting them all to level 20 or 21. Also, since you have a Dying Sun, it's probably ok to drop GMP on your Barrage and put in an Elemental Focus instead. Also, if you didn't notice or realize yet, the reason your Blood Rage isn't proccing with CWDT is that it has a higher required level than the CDWT it's linked to. Which is what you want, as for mapping it gives you attack speed and frenzy charges, and if you need some extra regen, if you have the Arakaali power with the first soul captured, that gives you extra ES recovery if you've stopped taking Damage over Time recently, so you just do a quick weapon swap or let it expire and you get some easy extra recovery.

Also, unless you really need the damage reduction, I'd swap out the Basalt flask for a Diamond Flask, or if you really want to keep the Basalt flask I'd even switch out the Silver for a Diamond, that will help you. And your rare items are OK, though they could all be upgraded for more damage mods, though for a quick upgrade, it looks like your ruby ring has an open prefix so you can throw some flat fire or cold on it. Your belt has a lot of ES, but if you could find a similar one as a Stygian Vise, that would give you an extra Jewel socket.

And speaking of jewels, yours for the most part can be improved to give you a decent DPS gain. First of all, unless you feel you really need that extra ES, i'd swap out the Energy from Within for a Damage and ES Jewel. Also, for you tree, i'd take 2 more points from the ES energy wheel above the scion starting spot and get the 2-pt jewel socket above VP, so then with that and other changed mentioned with the Piscator's your tree would look pretty much like this, http://poeurl.com/bUio. As for the jewels themselves, i'd aim for jewels like these, http://poe.trade/search/akoyuaukataniz, these all start from like 1 ex each, but those are the types you are looking for. You could always change up the search some, or lower the requirements even more, to see if they are more affordable for you if need be. For what you have, the order I'd upgrade them, if you can't upgrade all the jewels at once, would be Foul Call -> Hollow Goad -> Morbid Arbiter, and Hollow Goad and Morbid Arbiter are ok enough if you don't want to replace them. Also, if all 5 jewels have around 35+ ES on them, you don't really lose much, if at all, from your current setup if that's important to you.