Almost all druid helms not counting ravenlore which isnt as viable for summoner build since it gives more elemental skills and yes it gives +7 to raven, are not made with summon specialisation in mind.
Maybe we need unique helm which grants similar bonuses to some of those helms like Jalals mane but instead of giving +2 to shapeshifting which grants +2 to Summoning skills or helmet granting +3 to summoning skills(similar to ravenlore) and maybe +1-2 to certain summons (grizzlye dire wolves etc)