Some help with my lvl87 Mathil's Voidforge ConcPath Elementalist

Hi,

I have a couple of questions about improving my build in standard (Links at the bottom). I'm not really struggling, but I feel like a need a plan or a few solid goals to work towards.

1) I'm preparing to try and craft a chest with Attacks Have X% to Critical Strike Chance. I have an ilvl 84 Elder Gladiator Plate that I've gone broke trying to 6-socket (should've used the crafting bench instead of hundreds of jeweller's. What's the best way to craft the elder mod, life and resist?

2) What's my next upgrade besides the chest? I'm worried about my jewels, but can't seem to find the right ones that are affordable. Same thing with my Assassin's Mark ring.

3) Any other tips for this build? Or things I've missed?

I'm asking mostly because I'm broke (even in standard) from making some bad trading decisions and gambles (still learning, kind of a new player) and I'd hate to waste more currency and see the big upgrades slipping further away. I'd appreciate it if you guys help make some right decisions.

Character is Miravortex in my profile.
POB: https://pastebin.com/nBp4fFxa

Thanks!