You have plenty of mana to cast Flesh Golem Tombstone + Refresher Tombstone. Also MANGOS you troglodyte.
You do not have the mana to sustain aghanims because it requires the casting of decay upwards of 5 times. You need mana boots to sustain it and you're matching the cost of a refresher build without being able to pool your cores..
You can pool your offlaner too you retard. And if you offlane hero (Which should be able to farm under duress) is having problems farming then you have other problems to worry about.
Aghanims is jut not good on dirge unless you're being cored; and in the case of Core Dirge Radiance is far superior.
So please stop fucking talking about thing you don't fuckung understand. If you wanna keep posting cause it makes you feel warm and fuzzy inside go for it , but don't deny my science when I literally created the meta, and wrote the fucking patch notes.
I'd be more than thrilled to 1v1 mid against you just so I can fucking destroy you with one hand and I'll stream it.
There's no way you have Mana for aghs guys. You need at least 5 casts (115 each, so 575). But you have Mana for tombstonex2 (150 each), ult (100) and refresher (375). That's 200 more Mana my dude. You also again, don't get any Mana from refresher xd.