If using a mek find your whale, shoot the whale with a sniper or a longneck to get its aggro. Once done get some distance away to allow the whale to come straight toward you. One shot with the mek to its head with the cannon on the meks back will knock any level out. ( note: using a mek will ruin the efficiency of the tame) you will not get max level with a mek. Last night tamed a 130 and it gained 21 levels instead of the normal amount. For perfect tame mount a cannon on a skiff or rig something on the ground to place a cannon and aggro it toward it. They will break your cannon so beware.