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Yes, as JSWolf said for small changes advanced font control patch is usually better (although there are some rare fonts it doesn't perform well) if you only want to add weight. Change Glyph option is a bigger change, it removes fine details and adds weight.
Add weight with FontForge if the change is big, font control of Kobo performs badly with big changes. 22em is somewhat big but not so much that font controls won't work. So you should try both FontForge and font control. With FontForge, first only add weight and test the typeface. If some details are badly rendered or distorted, then use Change Glyph first, then add 16em or something similar.
Also, try removing the hints, it helps greatly.
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