You can apply for re4sidecne under SMC (if you meet the requirements) at any time. You aren't bound to follow a work to residence path.
If your EOI has now been selected, you can also get a work visa under these recently changed instructions.
WK2.5 Applications for work visas under Essential Skills work instructions
WK2.20 Instructions on duration of Essential Skills work visas
A 12-month Essential Skills work visa can be granted without a labour market test being completed if the applicant has been Invited to Apply for residence or is awaiting a decision on a Skilled Migrant Category application