It isn't possible to say a particular oral dose is equivalent to a particular transdermal dose with any confidence because this depends on the individual's absorption and metabolism which is highly variable.
Some people don't absorb transdermal very well at all but achieve good levels with oral, and vice versa.
In my personal experience oral doses are more potent than the equivalence charts suggest.
I suspect this is because "standard" oral doses were established pre 2002, based on clinical effectiveness, whereas patches and especially gels have come into use in the wake of the WHI, when it became all about minimising doses.
If femoston conti 1/5mg isn't enough, you can take two daily. If you don't mind bleeding there's also the 2/10mg tablets.
Alternatively, and this should only be done with specialist supervision, the oral combination can be topped up with gel or patch, however this changes the estrogen:progestin ratio so I would only do this with regular endometrial scans.