Do all Support Gems work with Summon Skills?

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Lo4f wrote:

Minion Life and Minion Damage supports would increase the explosion damage from instability.

Lo4f is correct on all counts except here - Minion damage will increase the damage the minions deal with their attacks or spells, but will not (currently) affect minion instability, due to it not being actual damage (same reason chance to ignite won't work atm).
Minion Life will increase the 'damage', since it's directly based on the minion's maximum life.

Minion Instability cannot possibly cause burning, due to not actually dealing damage within the game engine, due to current limitations. Nothing which triggers on damage being dealt, including critical hits or elemental status effects, will occur from the explosions.