Are there any big holes in my CoC Spark Blood Mage?

https://poe.ninja/poe2/profile/azaamaryk-1568/character/Zavaalia

Ha, my comet is about the same on this plastic coc bm build. It gets the job done though, so im ok with it. I'm saving for a staff upgrade, but bot sure I'll be able to afford one by end of league.

You need a higher es chest piece. Your jewels are not worth spending 5 passives for a slot. You are only getting 28% crit for that 5 points whereas taking stormcharged and two small crit nodes will give you 35% crit and 40% damage.

I would sub in Living Bomb over second Comet in the CoC setup. As it stands, you can barely afford to cast two of them with your current life total and life cost efficiency.

Projectile Acceleration III is better than Vilenta's Propulsion at your current cast speed, although coming with a cost multiplier. I would also sub in something else instead of Embitter, as it's just inflating your Spark cost without really contributing much to DPS. You might consider Efficiency to make Spark easier to cast until you can increase your life pool or find more efficiency on the helmet.

For crit chance, the biggest factor is mana and a double crit Rathpith. For reference, my build with 3k life and 5k mana gets +36% crit chance from the Rathpith alone, while you only get 9.9% with your current stats.

Nascent Hope can be replaced with a regular Thawing Charm with guard or whatever affixes you want.

- +4 Vertex

- 800+ ES Splendour (the higher the better)

- Rare gloves with socketed effect, mana/es/life to get more effiency from Tecrod's (once you have enough crit to comfortably switch. Also gives you some res and maybe crit damage bonus if within budget)

- 4 mod jewels, with crit chance or damage for suffixes, and probably spell/ele/triggered spells for prefixes.

As it is a meta build, the cost of upgrades grow exponentially but if you're happy with the current state of your build and don't mind continuing to grind, the potential is definitely there.

Im pretty sure that fast metabolism and instant leech are bugged from your gloves. I’d buy a mana/crit es gloves with 60% and get a heart of the well with 10-15% leech is instant your current works.

Drop the chest piece 100% the only reason to use it would be the super high es as it converts to life. If you got a spirit chest with like 800 es that would give you 6 more stacks of your globe. So 18% crit and 36% more damage and spirit. Or ditch spirit and go for a 1k+.

As for rings get spirit on chest or atd then stack int. Each 100 mana is 6% damage, 3% spell damage, and 4% gain as lightning. Get a breach ring with mana #, mana %, life # all res % cast speed % and whatever else then kalandras touch. Stack that mana and get a headhunter.

Buy an adorned jewel above 100% for effect on jewel passive. The get corrupted magic jewels that have max crit hit chance+ some other desirable mod. Basically u get over 30% crit hit chance per jewel