Single tooth home signal haltech

I'm looking to run full sequential ignition on a turbo g16b 4cyl engine controlled by haltech elite 1500.

I would utilise exisiting distributor housing with reluctor pickup and the exisitng toothed wheel machined down to a single tooth for the purpose of a home signal.

(similar modification to this link but I'd leave a single tooth only "https://support.haltech.com/portal/en/kb/articles/g13b-engine" )

Additionally I plan on machining/attaching a multi tooth wheel to fit also on the existing distributor shaft with a seperate hall effect sensor to act as a timing signal.

(i.e. both single tooth and multi tooth wheels inside dizzy housing sharing same shaft with two seperate sensors, similar to nissan CAS)

Firstly is this a pipe dream? Going of the Nissan CAS logic I dont see how it can?? (note vehicle is for offroad winch challenge where engine subject to submersion in mud/water/river crossings, so hesitant to use a crank mount system)

Secondly where do I position the single tooth home signal relative to TDC/multitooth wheel/missing teeth?

The haltech reference material notes a TDC offset be specified for the trigger wheel and related setup for determining the TCD offset, but makes no mention of advising the ECU the offset TDC for the home signal?

I don't understand how the ECU can achieve full sequential/sync if it doesnt know when to expect the single tooth Cam signal? i.e. first 360 degree of rotation (suck/squeeze) or second 360 degrees (bang/blow).

Any help aprreciated! cheers!