Here's my HUcast "Centurion/Arms max stat" Tellusis mag plan:
Stats: 2/182/16/0 (PPP mag)
Final stats put it +0.7 DEX over the limit (Ideally, you'd want 15 Dex instead of 16, but it's not a big deal in this case)
This is one of the more time consuming plans, but it assures the following:
A Tellusis with Twins
Compatible with the HUcast "Centurion/Arms max stat" plan
As for the Gael Gil or whatever you call it, you'd basically do the same up until your mag becomes a Kama. Then just feed it dimates until Lv100 and then feed it the mag cell and it's basically the same thing. Stats are identical.
For the full plan: