Changing bases, during an assault, and having a lower level, or higher level alt/friend, is not allowed. It is classed as an exploit of the PvP range.

On another note, I would like to remind players of the base Level cap's for laying bases. Please make sure that when laying bases from now on, you are above these limits.

Level/Max Base tech you can deploy
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<20 : 6
20 : 8
40 : 10
100 : 12
150 : 13
200 : 14
300 : 15
400 : 16
450 : 17
500 : 18
550 : 19
600+ : 20