Gear for Hiero Arc is expensive, since the build is pretty popular.
I took a look at your character btw

. Hope you don't mind me suggesting some changes
Why run Summon Skeleton + Portal + Faster Casting. I'm sure you can fit in something else. You're already running Cwdt+IC setup, a minion, move skill and an auro, I think a 2nd Cwdt setup with phasing and a vaal skill like Vaal Haste could work better.
For your Minion setup, get rid of Brutality and Minion life support. A possible change is Stone Golem + Decoy Totem + Faster Casting + Minion & Totem Resist Support. And you need to 20% quality that golem you already have with recipe (to get 20% inc. life on it).
Also 20% quality your other gems. I noticed quite a few sitting at level 20% and no quality. To do end game, you definitely need the quality on them.
Corrupt your level 20 Wrath. No risk, no rewards

.
3-link your 2nd wand and instead of added chaos damage, add faster casting and a culling strike support to your Flame Dash (and quality it!

).
Get new gloves. +28 life is just too low. You should be able to pick up gloves with 80+life and 70%+ resists for less than 10 chaos.
Same for boots. +7 life

Time to upgrade. Search for +60life, 30%move and 60%+resist. Should again cost you less than 10 chaos.
The Helmet!!! Destroy it

Get a rare helm with life and resists if needed or get a good unique one like a Devoto's.
Also, when upgrading gear, keep in mind Wise Oak if you want to go for that. I guess with Mind over Matter, you also need to be careful of your life:mana ratio (I think?).
For flasks, I noticed you have Rotgut, just buy a normal high level Quicksilver, make it 20% qual, and then roll the mods until you get something like increased duration, remove curse, remove freeze etc. I roll my flasks every league myself, it's cheaper than buying premade flasks and only takes a few minutes.
You should definitely be running Diamond and Silver flasks as well.
Belt can be upgraded as well. 80 life is good but I'm sure you can get lots more for less than 10 chaos. Also, there are plenty of affordable Stygian belts on sale. Dunno how much a abyss jewel will help your build though.
A minor point but you should have a 2nd set of weapons equipped with extra gems getting leveled there. (Although leveled gems are overall pretty cheap this league because of temple drops).
Edit: And I guess start saving up because a 6-link Mantle and a 2nd Shimmiron will probably cost over at least 7 exalts total.
Edit 2: Quality your gear as well! Every little helps and whetstones and armorer scraps are worthless anyways.
edit 3: I forgot to take a lot at your amulet and 2nd ring. But after taking a quick look.. need life!