(I sent you the basic plan, the rest is up to creative license)
"If you say so" he pointed "You, Altius? Get in the circle with me, you cast first and i'll augment your spell with my own, it won't work as well as an actual dual cast, but it's all we can work with unless you're REALLY good at magic"
Aren stood to the opposite side of the boat from dodger "Jacoby, over here, you are a combustion mage correct?"
"Yeah, but-"
"That means you can control wind, you're with me, we will cut out any that leap at them while casting and are responsible for saving anyone who may drown, Shade, you are an ice mage, you're our most valuable asset, I don't care what it takes, put us on an iceberg, we need solid ground", you need help casting, me and Jacoby will be here to offer more than enough mana"
"Hang on when did I agree to share my Mana with h-" A sharp glare showed he really didn't have a choice
"Sven, you hold tight, protect the ships captain, but don't use fire, we are still on a wooden vessel"