First, you need to refresh the event to get a real idea of the length of the farm.
People who farm from hard nodes invariably refresh their energy at least once per day, at the cost of 50 crystals. Save half of that and you'll have enough crystals for a reset of the MT event. It's annoying every time someone says that this is a 2 year farm. It's only a 2 year farm if you either don't care about/want MT, or if you are incredibly ignorant.
Saving 50 crystals per day will net you 1500 in the average 30 day month. Put 780 of it towards a refresh of the MT event. The remaining 720 can be used to purchase MT shards from the shop at a cost of 80 crystals per shard.
This will net you 29 MT shards per month.
A hard node farm nets you about 50 shards per month.
With MT you were given the first 65 shards for free, plus the event running twice in 2 days. If you refreshed the event you'd have 105 shards of MT.
The single hard node farm will take 6.6 months to complete start to finish
The MT farm should take about 7.75 months to finish with this method with only a slightly higher cost in crystals.
If you are that stubborn of a spender and don't want to use a 50 crystal refresh during your hard node farm as a basis for cost, than you really aren't a very good player of this game, and thus your opinion on the matter does not matter.
Realistically, good players refresh 3 times per day and have crystals to spare.
