I need lower gears to make climbing easier

WiFli rear mech works fine with a 11/34 cassette, have not tried it with 11/36.

Its not too weird, but I would hold off and just get the 12-36 cassette

If in the future you want even lower, look at the FSA Adventure crankset.  That has a 90mm BCD and will take 30t inner chainring

The issue you have with the Rotor crankset is it has 110mm BCD.

Generally that restricts the inner ring to 34t.  Absolute Black do smaller rings, but I cannot find if these rings fit the Rotor crank-hence email enquiry.

The road link is a cheap way to fit a larger cassette whether 11-36 or 12-36.   You might need a slightly longer chain, but fitting cass will make it clear. 

I would approach these steps in this order

Fit 12-36 cass and road link, check and adjust rear derailleur if needed and check all gears are possible. 

Once satisfied look into modify crankset. 

Email Absolute Black in the meantime for information.

Not in 10 speed.  If you wanted more, it then involves new 11 speed shifters derailleur and cassette.

Check the rear mech gear range.

Change the inner ring.

Check chain tension/length/adjust.

Build legs up by intervals up a hill.

Recover and eat well.

Just as a word of advice, if you're going for more climbing gears you really need to look at your gears past the midway point. I added a 34 or 36t rear cog onto an 8 speed when recovering from injury so had a 34t front and 11/34or36 rear, it was horrible.

The jumps between cogs made the next gear up from the easiest ffel like you were climbing in the worlds toughest gear. You either need a 10/11 speed cassette or be prepared to drop the 11t 13t etc. cogs!

You would need to email Absolute Black to confirm which of their sub compact chainring fits the Rotor crank .   If they dont fit and you still want 30-36 combination, it will involve crankset change(possible bottom bracket bearings) too.  

As per previous thread, its a case of buying a bike and modifications or frameset- build your own.  Youve bought bike, modify away

To go lower than 1:1 your ideal option is to fit a WiFli mid cage rear mech. The Wolf Tooth Roadlink will also work but to me is a bit of a hack.

The SRAM compatibility chart for the Force rear derailleur mid cage suggests the lowest gearing would be 32 on the back. 

https://www.sram.com/sites/default/files/techdocs/gen.0000000004941_rev_b_compatibility_map_2016_road_components.pdf

I’m assuming it’s a mid length cage rather than a short. The SRAM spec sheet unhelpfully doesn’t provide the capacity, so I can’t see if 46/34 and 11/36 would work- it might do, but you would be pushing the boundaries of the reach (big cassette) and range (difference in lowest to highest gear).

A common solution to this problem is to use a SRAM XX MTB rear mech - go for long cage. This is compatible with Force road shifters, and will easily swallow the range.

Depends on how much lower you might think you need.   You.could swap the inner chainring to 34t.  Swap the cass PG1030 11-36 10 speed.   You probably need a 'roadlink' from Wolf tooth.