Will adding dragon’s blood resin (incense) to sexual fluids or one’s own blood boost the potency of these liquids to anoint /charge / activate sigils ?
No, it will not.
You can’t really boost the effect of blood. However, using blood too often can ruin its potency.
If a sigil is somewhat related to Mars (a spirit or a goal etc.), dragon’s blood may perhaps be helpful.
From my experience I can say adding some blood to dragon’s blood resin or incense can boost the potency of the ritual. I hope it helps a little.
This is strictly to paint or draw sigils
If you feel it can boost the sigil, I see no reason not to do it. It seems fine to me.
Boost? No. However, the energies of any incense or herbs or even powdered minerals can further help shape the energy of the spell, or in this case creation of the “ink” which which you draw the sigil. I would not make too much at once, though, as blood swiftly looses its potency.