Light & Rain Element of Cray Elemental! 10,000 base Unit Support!

Rain Element, Madu

Stride (Released when both players' vanguards are grade 3 or greater!)-Stride Step-[Choose one or more cards with the sum of their grades being 3 or greater from your hand, and discard them] Stride this card on your (VC) from face down.
[AUTO]:When this unit is placed on (VC), if your have a Heart card with original [Power] of 10000 or less, choose a grade 3 card from your drop zone, and put it into your hand.
[CONT]:This card is also of all clans and nations.

You can get both Rain Element, Madu & Light Element, Pica in Cardfight!! Vanguard Fighter's Collection 2015. Both of them can be used for a Heart (grade 3 unit) with 10,000 power where with Madu you can possible re-stride again and again as long as you keep a grade 3 unit in your hand.

Well, based on many would prefer to play this with Legion. I think it won't be problem to use it since you may choose the Legion mate as your heart and thus regain back your cost for Stride.

Light Elemental, Pica

[AUTO](RC) Generation Break 1 (This ability is active if you have one or more face up G units in total on your (VC) or G zone):When your opponent's unit attacks a vanguard, choose one of your vanguards, and if that unit's [Power] is 10000 or less, that unit gets [Power]+1000 until end of that battle.
[CONT]:This card is also of all clans and nations.

While Pica is a defense support unit for 10000 power base grade 3 unit the deck.Since its skill will require a GB1, thus, it won't works on early game unless you manage to flip a card on your G-zone during the early game.

Based on my opinion, if you are making a deck for 10,000 power base grade 3 as main vanguard, it would be good to play both of these cards as support.