My advice would be along a similar lines but rather more drastic.
It is generally better to focus and not spread points around when gear and points are minimal. Gear is a really big part of a build performance later on.
I’d suggest to remove all points from Arcanist except one or 2 in inner focus-only if need OA - and a point in nullification, which is handy on some bosses. —until you get more skills and find better items
And as mentioned, move from Conviction to Aura of Censure. Max this and max inquis seal. These will also do a lot of support damage.
This should be all the defense you need for current needs and as such Maiven’s sphere is not critical. It will get harder later, but you’ll have a better gear selection for tailoring skills.
If you don’t like Inquisitor seal game play, then umm…you could try augmenting your damage with a rune such as Rune of Haggard, Word of Pain or Arcanist CT (also see devotion notes below).
A small investment in Isk EE is inferior at this point to simply putting some basic components on your weapons, such as chilled steel or whatever you currently have that fits into your cold/lightning idea (flat damage, 10%to physical convert, etc)
Olex Flash Freeze is only good if it actually freezes, and I actually don’t know if it works well early in the game. Later it will be ineffective vs most heroes and bosses, and if it doesn’t work, it won’t tick for an attached devotion proc.
Also, devotion procs:
There is a problem with tying devotion procs to % chance procs. It reduces the % chance drastically: basically it is %chance*%chance = very low chance.
I would move the procs away from Chilling rounds and Bursting.
A better bet is attaching these to some support skill like Word of Pain, Inquis seal, etc… that ticks 1 per second over a duration and you get the full devotion %chance per second, every second.
If you don’t want to grab some support skills, then I’d recommend for now reworking and getting Viper for some extra RR - and viper is not tied to a skill so any weapon attack will apply it.
Another power devotion proc that you could maybe look at is Blizzard, which is a 100% on crit and could be attached to Inquisitor seal or some other support skill…if you can get your OA to a point where crit chance% is 10-15+, which should not be that hard with the skills selections you have available.
For future consideration.
A default attack replacer is superior to none. Shard of Beronath component is your best bet and iirc this is a random find? Anyways…this boosts all those proc wps damages and you can also tie a devotion proc to this. (there are a few others via items)