Just did some math on the forumula costs:
Current cost for one epic weapon is (assuming 3 cores per epic is needed to craft one) 72 tokens for the component form + 288 tokens for the epic form + 72 (24 tokens x 3 cores) = 432 tokens in all for one epic weapon you make yourself. Cost of someone else making it where you provide the cores is 72 tokens.
New cost after Delta 268 patch for one epic weapon (still assuming 3 cores per epic) 144 tokens for the component form + 24 tokens for the epic form + 288 (96 tokens x 3 cores) = 456 tokens in all for one epic weapon you make yourself. Cost of someone else making it where you provide the cores is 288 tokens.
Change in cost for making an epic yourself: +24 tokens. Change in cost for someone else making it where you provide the cores: +216 tokens.
Conclusion: buy all the cores and component forms you can now.