Earth and water splinters are the most magic power stores, that doesn't mean they dont have strong magic cards, well they don't have direct summoner boost and that's a problem, but Delwyn Dragonscale comes to solve that making Life splinter (also fire can be devastating in certain rulesets) very strong!
I love Djinn Renova with its triage and strengthen, time mage with the slow and dax paragon for super magic counter, along with lord arianthus as tank they make a strong combo!
Take a look of the following match that all the cards synergize greatly against a tough opponent!!!!
https://splinterlands.com?p=battle&id=sl_a1c3e385ea578031896e7baadd0e3193&ref=cryptomaniacsgr